Return to the thumbnail page Display/hide file information See previous file See next file

Thinnest phosphor ever seen in an American fluorescent lamp

Thinnest phosphor ever seen in an American fluorescent lamp

Click to view full size image

What a joke. The only fluorescent lamps comparable to this are some Soviet lamps I have seen on L-G. Additionally, this is the 1800 lumen Utility cool white lamp. Why didn’t the feds ban this instead?

F58C7F73-8A30-4BF4-9E7E-905DF6939761.jpeg 2F2BA9B2-74D3-4E6C-B4DE-518D0DFAF8BF.jpeg 9B09746B-BA4C-4281-BECD-56D95C92BF3D.jpeg 28AB80C3-D3B1-4CC4-9714-49DF5BEB417F.jpeg

Light Information

Light Information

Manufacturer:General Electric
Model Reference:F32T8/C41C/ECO
Lamp
Lamp Type:Fluorescent
Base:G13
Shape/Finish:T8
Service Life:15,000 hrs
Electrical
Wattage:32w
Current:265mA
Optical
Lumen Output:1800 lumens wow lame
Lumen Efficacy:only 50 lpw
Color Temperature:4100K
Color Rendering Index:87
Physical/Production
Dimensions:48 inches nominal
Factory Location:Bucyrus Ohio
Fabrication Date:2018

File information

File information

Download: Download this File
Filename:9B09746B-BA4C-4281-BECD-56D95C92BF3D.jpeg
Album name:silverliner / Fluorescent - T-5 and T-8
Rating (2 votes):
Keywords:Lamps
File Size:413 KB
Date added:Mar 18, 2019
Dimensions:1848 x 2464 pixels
Displayed:541 times
Date Time:2019:03:17 18:03:59
DateTime Original:2019:03:17 18:03:59
Exposure Bias:0 EV
Exposure Time:1/15 sec
FNumber:f 2.2
Flash:No Flash
Focal length:4.15 mm
ISO:25
Make:Apple
Model:iPhone 6s Plus
Software:11.4.1
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-157524
Favorites:Add to Favorites
Comments
Binarix128
Newbie
*
Offline

Gender: Male
Posts: 46
View Gallery

220V AC 50Hz


UCOUT2noI2R__jgPSJUjGRtA
View Profile Personal Message (Offline)
Mar 18, 2019 at 03:32 PM Author: Binarix128
I think the light emmited from this tube likes more a frosted mercury vapor lamp

-I dont speak English very well. Compact Fluorescent (PL)
-Say NO to incandescent bulbs ban! Incandescent Lamp
-lamp saver Mercury Vapor Lamp

HomeBrewLamps
Hero Member
*****
Offline

Gender: Male
Posts: 1385
View Gallery


SodiumVapor 105843202020668111118 UCpGClK_9OH8N4QkD1fp-jNw majorpayne1226
View Profile Personal Message (Offline)
Mar 18, 2019 at 03:33 PM Author: HomeBrewLamps
Buy them! Even if they're shitty lamps they'll still look cool lit up I think.

~Owen

Mercury Vapor LampHigh Pressure Sodium Scavenger, Urban Explorer, Lighting Enthusiast and Creator of homebrewlamps Cool High Pressure SodiumMercury Vapor Lamp

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 18, 2019 at 04:39 PM Author: Powergroove
And GE's CEO wonders how to fix its slumping stock values. GE used to mean quality, now it means junk. Most of their lamps are made for GE now days. What a joke, These would have never made it to market before the turn of the century.

Keep government out of the lighting industry.

Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 18, 2019 at 04:42 PM Author: Lightingguy1994
1800 lumens on a T8 is total garbage. I wouldn't buy these even if they were the last tubes on the planet. As if they try to pass off 1800 lumens , T8s can do almost twice that amount.

They didn't ban these because they want to make LED look better. Since LED can barely push 2000 lumens, they had to make the T8 look dimmer on purpose. Seriously, 1800 lumens is total scum. That means its mean lumens will be around 1300L
Lumex120
Hero Member
*****
Online

Gender: Male
Posts: 1414
View Gallery

105555521242365640724 UCM30tBQDUECOV6VeG5W87Vg zfarmadillo
View Profile Personal Message (Online)
Mar 18, 2019 at 04:46 PM Author: Lumex120
32w, 1800 lumens? What a joke. That's not much more efficient than a mercury lamp.

Any machine is a smoke machine if you operate it wrong enough.

fluorescent lover 40
Full Member
***
Offline

Gender: Male
Posts: 134
View Gallery

Lights are awesome! :)


View Profile Personal Message (Offline)
Mar 18, 2019 at 04:53 PM Author: fluorescent lover 40
Yeesh, my F32T8/ADV850 does 3050 lumens lol.

Current: US 120v 60hz
Power provider: Southern California Edison (SCE)

-Date decoder of some US lamps 1960-present.
-I'll save any vintage lamp... dead or alive! Smiley

joseph_125
Sr. Member
****
Offline

Gender: Male
Posts: 307
View Gallery


GoL
View Profile Personal Message (Offline)
Mar 18, 2019 at 07:42 PM Author: joseph_125
I'd probably just buy it as a novelty. Would probably look pretty neat lit up. Can't say much about the quality or the lumen output though. You'd probably blow these away with a decent T8 lamp on even a low ballast factor ballast.
xmaslightguy
Hero Member
*****
Offline

Gender: Male
Posts: 779
View Gallery

^homebuilt fixture


GoL ATL
View Profile WWW Personal Message (Offline)
Mar 18, 2019 at 08:46 PM Author: xmaslightguy
Wow thats some thin phosphor, you can clearly see the filament
Is it any thicker at the other end?

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 282
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Mar 19, 2019 at 05:38 AM Author: rjluna2
Cool!

Pretty, please no more Chinese failure.

streetlight98
Sr. Member
****
Offline

Gender: Male
Posts: 323
View Gallery

Mike McCann


GoL 88219189@N04/albums
View Profile WWW Personal Message (Offline)
Mar 19, 2019 at 06:10 AM Author: streetlight98
Seems like GE might not be around for too much longer, at least not as the company it is today.

To resist is to piss in the wind, anyone who does will end up smelling.

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 19, 2019 at 07:31 AM Author: Powergroove
More things are made for them now instead of by them. I think its funny how they claim they quit making compact fluorescent. They never made them to begin with, they only licensed their name to other manufactures. Look at the packaging. It says made FOR GE by whoever.

Keep government out of the lighting industry.

James
Full Member
***
Offline

Gender: Male
Posts: 136
View Gallery


View Profile WWW Personal Message (Offline)
Mar 19, 2019 at 04:49 PM Author: James
Most unusual, it looks like they only used pure phosphor without the usual diffuser powders that make the coating non-transparent. Please do post a photo of them lighted if you can!
Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 19, 2019 at 05:42 PM Author: Lightingguy1994
I see in the background that they still have the BLB tubes (the tubes with the white and pink sleeve), those have stopped being available here in Canada last year, at least everywhere here in my area
wide-lite 1000
Sr. Member
****
Offline

Gender: Male
Posts: 264
View Gallery


View Profile Personal Message (Offline)
Mar 19, 2019 at 06:20 PM Author: wide-lite 1000
Now there's some quality! Guess you could call that a germicidal cool white!

Collector,Hoarder,Pack-rat! Clear mercury Rules!!

joseph_125
Sr. Member
****
Offline

Gender: Male
Posts: 307
View Gallery


GoL
View Profile Personal Message (Offline)
Mar 19, 2019 at 08:40 PM Author: joseph_125
Yeah the /BLB tubes disappeared from big box store shelves here last year too. I can still get F40/BLB tubes locally, but through lighting and electrical suppliers instead of places like Lowe's, HD, and CT.
High Intensity
Full Member
***
Online

Gender: Male
Posts: 114
View Gallery

Sylvania 100w /DX MV Cold Startup


GoL
View Profile Personal Message (Online)
Mar 19, 2019 at 11:03 PM Author: High Intensity
1800 Lumens for an F32T8 is pretty bad, a CFL can put out more light while using less energy than this thing.

Old lighting is, and will always be, the best lighting.

suzukir122
Hero Member
*****
Offline

Gender: Male
Posts: 650
View Gallery


suzukir123
View Profile Personal Message (Offline)
Mar 20, 2019 at 03:39 AM Author: suzukir122
See, I've always been a fan of thinner phosphors, due to EOL shows. Especially on T12s... but... this is just going too far.
Are all the T8 lamps in that store, from GE, identical to this? And is this also the case on the non-etched ends?

Interests
1. Motorcycles, Women, and Lighting (especially fluorescent)
2. Weighting/staying extremely athletic
3. Severe Thunderstorms of all kinds
4. Food and drinks. So gimme them bbq ribs
Yep
Lighting has been a passion of mine since I was born. I consider everyone on LG to be a friend

Silverliner
Administrator
Hero Member
*****
Offline

Gender: Male
Posts: 701
View Gallery

Verd a ray classic.


GoL
View Profile Personal Message (Offline)
Mar 20, 2019 at 03:46 AM Author: Silverliner
Yes there are more like this at this Walmart location. Maybe I should get a pair. I think the non etched ends are normal.

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

suzukir122
Hero Member
*****
Offline

Gender: Male
Posts: 650
View Gallery


suzukir123
View Profile Personal Message (Offline)
Mar 20, 2019 at 03:49 AM Author: suzukir122
I'm going to check out the ones at my local Walmart(s) and see if I find this phenomenon as well. I *might* buy some... although
their lumen output claim is obviously false. lol... but EOL might prove to be very interesting

Interests
1. Motorcycles, Women, and Lighting (especially fluorescent)
2. Weighting/staying extremely athletic
3. Severe Thunderstorms of all kinds
4. Food and drinks. So gimme them bbq ribs
Yep
Lighting has been a passion of mine since I was born. I consider everyone on LG to be a friend

Men of God
Jr. Member
**
Offline

Gender: Male
Posts: 86
View Gallery


jiachao.wei.71 chao_813975447 UChyTpXvlQ8ZCfBPP_lJjubg chao990613
View Profile Personal Message (Offline)
Mar 20, 2019 at 05:49 AM Author: Men of God
这真是个坏消息…

我不会英文,所以我用中文,请你们用翻译网站翻译我打的字!

I can't in English, so I in Chinese, please use the translation website to translate my words!

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 282
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Mar 20, 2019 at 06:10 AM Author: rjluna2
You should see Thin Phosphor Coating on Alto Lamps fitted at our basement

Pretty, please no more Chinese failure.

Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 20, 2019 at 09:28 AM Author: Lightingguy1994
If anyone gets these, do a pic where you compare one to a good T8 and tell us if the brightness really is bad or if its just a lie
vytautas_lamps
Newbie
*
Offline

Gender: Male
Posts: 7
View Gallery

My idol is Mylene Farmer, deal with it.


View Profile Personal Message (Offline)
Mar 20, 2019 at 11:19 AM Author: vytautas_lamps
I wouldn't care tbh. These look exotic af and if they are the piece of a joke at 1800 lumens, they are still collectibles. Their practically clear!

New lighting technologies is a pity fest everywhere you look. From LEDs that last only for two months, to a never-ending global starvation of t8 fluorescent tubes.
We shall reinforce ourselves with good old full mercury t12s and HIDs made to surpass one's life, and give them all the middle finger ;

suzukir122
Hero Member
*****
Offline

Gender: Male
Posts: 650
View Gallery


suzukir123
View Profile Personal Message (Offline)
Mar 20, 2019 at 11:47 AM Author: suzukir122
Oh yeah don't forget... these ends, if they reach EOL, will be EXTREMELY blackened compared to normal T8 EOL lamps

Interests
1. Motorcycles, Women, and Lighting (especially fluorescent)
2. Weighting/staying extremely athletic
3. Severe Thunderstorms of all kinds
4. Food and drinks. So gimme them bbq ribs
Yep
Lighting has been a passion of mine since I was born. I consider everyone on LG to be a friend

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 21, 2019 at 04:02 PM Author: Powergroove
Poor quality control is what this is, but then again why would they even sink to selling an 1800 lumen lamp. F40/ADV830 is 3600 lumens, twice the lumens and only 8 more watts.

Keep government out of the lighting industry.

suzukir122
Hero Member
*****
Offline

Gender: Male
Posts: 650
View Gallery


suzukir123
View Profile Personal Message (Offline)
Mar 22, 2019 at 06:01 AM Author: suzukir122
I wonder if LED production could play a role in this...? Because obviously, less phosphors will mean less light. Maybe
this is an attempt to get people to switch over to LED products... this is just a thought... doesn't mean it's actually true.

Interests
1. Motorcycles, Women, and Lighting (especially fluorescent)
2. Weighting/staying extremely athletic
3. Severe Thunderstorms of all kinds
4. Food and drinks. So gimme them bbq ribs
Yep
Lighting has been a passion of mine since I was born. I consider everyone on LG to be a friend

Lumex120
Hero Member
*****
Online

Gender: Male
Posts: 1414
View Gallery

105555521242365640724 UCM30tBQDUECOV6VeG5W87Vg zfarmadillo
View Profile Personal Message (Online)
Mar 22, 2019 at 06:56 AM Author: Lumex120
This is definitely a result of LED. Everytime a new lighting tech comes out, the quality of outher sources is trashed to make people switch over. Mercury lamps had the same thing happen when HPS came out.

Any machine is a smoke machine if you operate it wrong enough.

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 282
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Mar 22, 2019 at 07:23 AM Author: rjluna2
That is an interesting conspiracy theory, Lumex120

Pretty, please no more Chinese failure.

streetlight98
Sr. Member
****
Offline

Gender: Male
Posts: 323
View Gallery

Mike McCann


GoL 88219189@N04/albums
View Profile WWW Personal Message (Offline)
Mar 23, 2019 at 04:33 AM Author: streetlight98
I feel that it is true though. When new tech comes out, manufacturers invest heavily in it and as a result, cheapen the quality of existing tech to free up funds for the new stuff.

To resist is to piss in the wind, anyone who does will end up smelling.

Binarix128
Newbie
*
Offline

Gender: Male
Posts: 46
View Gallery

220V AC 50Hz


UCOUT2noI2R__jgPSJUjGRtA
View Profile Personal Message (Offline)
Mar 23, 2019 at 08:11 AM Author: Binarix128
Bad quality product

-I dont speak English very well. Compact Fluorescent (PL)
-Say NO to incandescent bulbs ban! Incandescent Lamp
-lamp saver Mercury Vapor Lamp

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 09:31 AM Author: Powergroove
Hows this for a sales pitch?

Our new T12 lamp makes 3600 lumens vs this T8 lamp at only 1800 lumens. Twice the light of a 32 watt lamp for only 40 watts. That's leadership in lighting, thats Philips.

Keep government out of the lighting industry.

Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 09:58 AM Author: Lightingguy1994
It seems to me philips is the last one to hold onto their lamps or at least some.

I tried GEs current offerings- that was crap, tried sylvanias current offerings... Still crap though the usa ones i can tolerate. But philips Supreme CW F40s work the best. Can see flakes of mercury in them and they start up without migration issues when unused for weeks. At 2600 lumens they are brighter than other offerings for cool white
ace100w120v
Hero Member
*****
Offline

Gender: Male
Posts: 665
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 12:59 PM Author: ace100w120v
Pretty lame at 1800 lumens! The GE F40s are currently 2900lm, even improved T8 version. The irony of F40s having better LPW than F32T8 makes me chuckle!
Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 01:03 PM Author: Lightingguy1994
The GE F40s seem to have little mercury in them, especially the 3000K one, takes 10 minutes for it to warm up and stop being dim / flickery and migrated. The DX one did that but very slightly so its tolerable. The CW ones are not sold in Canada for some reason. Lowes carries the WW and DX 2900L ones but they have to have Sylvania for the CW. Oddly enough they do sell a case of Sylvania F34 DX in 1980Lumens in some Rona's
Silverliner
Administrator
Hero Member
*****
Offline

Gender: Male
Posts: 701
View Gallery

Verd a ray classic.


GoL
View Profile Personal Message (Offline)
Mar 23, 2019 at 02:15 PM Author: Silverliner
Sylvania Premium CW and WW F40T12s are 3000 lumens. GE F32T8s in cases at Lowes are 3000 lumens. Pretty impressive?

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 02:42 PM Author: Powergroove
I am converting a 4 lamp F17T8 to F20T12. I'm going to use F20T12/DSW in it. They are a good match for my Royal White lamps. Premium Designer Soft White is D830. Designer Cool White at 3000 lumen 90 cri is a decent lamp.

Keep government out of the lighting industry.

ace100w120v
Hero Member
*****
Offline

Gender: Male
Posts: 665
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 02:46 PM Author: ace100w120v
The F34/DX would be interesting to have...
Daniel f
Newbie
*
Offline

Gender: Male
Posts: 0
View Gallery

in my house is not used led and if I can avoid it


View Profile Personal Message (Offline)
Mar 23, 2019 at 02:56 PM Author: Daniel f
Hi . I do not understand a lot of fluorescents. but this example I like. It looks like the filament of a car bulb inside. fluorescents actually have incandescence?
Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 02:56 PM Author: Lightingguy1994

Sylvania Premium CW and WW F40T12s are 3000 lumens. GE F32T8s in cases at Lowes are 3000 lumens. Pretty impressive?



**Re written my reply for simplicity**

Yes but unfortunately we don't have some of these options here in Canada.

Heres what I see in stores in Canada:

-F40T12-
3000K Warm White:
Sylvania: - 3000L
General E: -2900L
Philips: - 2500L

4100K Cool White
Sylvania: - 2500L-(F40) / 2150L-(F34)
General E: - Not Available in Stores
Philips: - 2600L (Supreme) / 3500L (CWP)

5000K / 6500K Daylight
Sylvania: - 2400L-5000K (F40) / 1980L-6500K (F34)
General E: -2900L
Philips: - 2350L-(6500K) / 2500L-(5000K)
~~~~~

-F32T8-
3000K Warm White:
Sylvania: 2475L-(3000K) / 2900L-(3500K)
General E: 2900L
Philips: 2800L

4100K Cool White
Sylvania: 2450L
General E: Not Available in Stores
Philips: 2850L

5000K / 6500K Daylight
Sylvania: 2850L
General E: 2900L
Philips: 2850-(5000K) / 2710 (6500K)

If anyone in Canada sees the GE cool white lamps, please let us know. If there are any errors in my list, also let me know
CEB1993
Hero Member
*****
Offline

Gender: Male
Posts: 776
View Gallery

Camden


View Profile Personal Message (Offline)
Mar 23, 2019 at 02:59 PM Author: CEB1993
I had no idea fluorescent tubes could work with such a thin phosphor coating. Looks like some UV radiation might be able to sneak through.

I would be interested in what the cathodes look like when the lamp here is switched on. Definitely an interesting find.

Philips DuraMax and GE Miser forever!  Classic incandescents are the best incandescents!

streetlight98
Sr. Member
****
Offline

Gender: Male
Posts: 323
View Gallery

Mike McCann


GoL 88219189@N04/albums
View Profile WWW Personal Message (Offline)
Mar 23, 2019 at 04:37 PM Author: streetlight98
The UV rays cannot pass through glass.

To resist is to piss in the wind, anyone who does will end up smelling.

suzukir122
Hero Member
*****
Offline

Gender: Male
Posts: 650
View Gallery


suzukir123
View Profile Personal Message (Offline)
Mar 23, 2019 at 05:27 PM Author: suzukir122
UV rays can definitely pass through glass, but I'm pretty sure it depends on what glass is used. So if I'm correct, the glass with the
bulbs shown in this picture (as well as any typical fluorescent lamp) prevents most of the UV rays from passing through. But clear "germicidal"
lamps, and lamps relevant to them -- that would be a different story.

@Daniel F, the phosphorus coating on the electrode filaments make it a little tougher to see the electrode filaments. The filaments *should*
be a lot thicker than what we can see. If not, both lamps would reach EOL rather quickly.

Interests
1. Motorcycles, Women, and Lighting (especially fluorescent)
2. Weighting/staying extremely athletic
3. Severe Thunderstorms of all kinds
4. Food and drinks. So gimme them bbq ribs
Yep
Lighting has been a passion of mine since I was born. I consider everyone on LG to be a friend

xmaslightguy
Hero Member
*****
Offline

Gender: Male
Posts: 779
View Gallery

^homebuilt fixture


GoL ATL
View Profile WWW Personal Message (Offline)
Mar 23, 2019 at 07:11 PM Author: xmaslightguy
Quote
GE F32T8s in cases at Lowes are 3000 lumens. Pretty impressive?
That's more what I'd go for.. but I don't really consider it impressive to be impressive it'd have to be over 3200-lm
If I'm going for maximum efficiency though, I'd stick to T5(normal output)...that's the only one I know of which will do over 100 lm/w


Quote
UV rays can definitely pass through glass, but I'm pretty sure it depends on what glass is used.
Yep, that's exactly it.

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

xmaslightguy
Hero Member
*****
Offline

Gender: Male
Posts: 779
View Gallery

^homebuilt fixture


GoL ATL
View Profile WWW Personal Message (Offline)
Mar 23, 2019 at 07:15 PM Author: xmaslightguy
I'd like to have a EOL one of the lamps in this pic...for no other reason, than to watch a nearly-clear lamp fry in person

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

suzukir122
Hero Member
*****
Offline

Gender: Male
Posts: 650
View Gallery


suzukir123
View Profile Personal Message (Offline)
Mar 23, 2019 at 07:25 PM Author: suzukir122
@Xmaslightguy, I'd rather have one (or two) for EOL as well... lol... with or without the electrode filament involved... although
I prefer the electrode filament to be involved though to get more EOL action/fireworks. An EOL with one of these lamps would be amazing/dazzling.

Interests
1. Motorcycles, Women, and Lighting (especially fluorescent)
2. Weighting/staying extremely athletic
3. Severe Thunderstorms of all kinds
4. Food and drinks. So gimme them bbq ribs
Yep
Lighting has been a passion of mine since I was born. I consider everyone on LG to be a friend

CEB1993
Hero Member
*****
Offline

Gender: Male
Posts: 776
View Gallery

Camden


View Profile Personal Message (Offline)
Mar 23, 2019 at 07:31 PM Author: CEB1993
I remember seeing a clear Sylvania T12 in one of my lighting tech. classes for an engineering example. The clear tubes were never mass produced. I could see the excited mercury gas, but there was no phosphor for it to illuminate. That makes sense that these are such low lumens, due to the stingy phosphor coating.

Philips DuraMax and GE Miser forever!  Classic incandescents are the best incandescents!

BlueHalide
Sr. Member
****
Offline

Posts: 370
View Gallery

View Profile Personal Message (Offline)
Mar 23, 2019 at 08:17 PM Author: BlueHalide
I have three Sylvania F32T8 "5000K" lamps that were manufactured late last year, they have the same poor phosphor uniformity issue as the lamps pictured above, super thin phosphor at one end and very heavy on the other, almost as if these lamps are positioned vertically as they are coated and the phosphor mixture is too runny/thin. The lamps actually have different color at either end, the end with the thin phosphor is dimmer and slightly greener
ace100w120v
Hero Member
*****
Offline

Gender: Male
Posts: 665
View Gallery


View Profile Personal Message (Offline)
Mar 23, 2019 at 08:23 PM Author: ace100w120v
Knowing GE, could these be Sylvania-made?
d3anio97
Newbie
*
Offline

Gender: Male
Posts: 24
View Gallery

Enginerding bright things since 2011


ATL TheSOXMania
View Profile Personal Message (Offline)
Mar 23, 2019 at 11:35 PM Author: d3anio97

UV rays can definitely pass through glass, but I'm pretty sure it depends on what glass is used. So if I'm correct, the glass with the
bulbs shown in this picture (as well as any typical fluorescent lamp) prevents most of the UV rays from passing through. But clear "germicidal"
lamps, and lamps relevant to them -- that would be a different story.

@Daniel F, the phosphorus coating on the electrode filaments make it a little tougher to see the electrode filaments. The filaments *should*
be a lot thicker than what we can see. If not, both lamps would reach EOL rather quickly.


long wave ultraviolet (UV A and B) can pass through soda lime glass (which is commonly used as it's cheap, filters short wave UV and is plentiful), however it blocks short wave UV. If these lamps were made from Quartz like a germicidal lamp is, then that would be a different story. UV A and B can still pass but so can UV C. Even with a phosphor coating, there would be a risk of UV leakage from these lamps. Also, this is why you should NEVER run a discharge lamp if the outer bulb has shattered. MH and mercury vapor lamps especially kick out ridiculous amounts of UV C in operation. Most of it is filtered by the outer envelope, or in the case of MBIL and similar un-shielded lamps, the glass front of the light fixture does the filtration.

What if I told you you could save 100% of your street lighting budget? Don't believe me? Buy an LED street light and run it for a week. the results will leave you in awe. (Aaaaaaand maybe wondering why you swapped that 70w SON)

d3anio97
Newbie
*
Offline

Gender: Male
Posts: 24
View Gallery

Enginerding bright things since 2011


ATL TheSOXMania
View Profile Personal Message (Offline)
Mar 23, 2019 at 11:51 PM Author: d3anio97

Hi . I do not understand a lot of fluorescents. but this example I like. It looks like the filament of a car bulb inside. fluorescents actually have incandescence?

Not really. The "filaments" at either end are cathode assemblies. They themselves do not produce the bulk of the lamp's light. They are only made to glow while the lamp is being started, and do not operate in the same way an incandescent does. In stead, you have two cathode assemblies at either end of the lamp, each with a special thermionic emissive coating. This coating reduces the voltage required for the lamp to operate. When the lamp is powered on, the cathodes are made to heat for a short moment by passing a current through them like a regular incandescent lamp. This is to warm the coating on the cathodes and cause it to emit ions. When the cathode has heated enough to begin emitting, a high voltage pulse is used to ionise the low pressure argon and mercury atmosphere inside the lamp and make it become conductive. It's quite similar to how a high intensity discharge lamp operates and shares similarity with low pressure sodium technology, which also employs emissive coatings, low pressure gas and high voltage pulses for ignition. Only low pressure sodium does not need nor have a preheat period in its ignition cycle.

What if I told you you could save 100% of your street lighting budget? Don't believe me? Buy an LED street light and run it for a week. the results will leave you in awe. (Aaaaaaand maybe wondering why you swapped that 70w SON)

d3anio97
Newbie
*
Offline

Gender: Male
Posts: 24
View Gallery

Enginerding bright things since 2011


ATL TheSOXMania
View Profile Personal Message (Offline)
Mar 23, 2019 at 11:54 PM Author: d3anio97

The UV rays cannot pass through glass.

short wave (UV C) cannot pass through regular soda lime glass, only Quartz. However, UV a and B can both pass through soda lime glass, which is commonly used in High intensity discharge, fluorescent and incandescent lamps as it's cheap, readily available, and filters UV C.

What if I told you you could save 100% of your street lighting budget? Don't believe me? Buy an LED street light and run it for a week. the results will leave you in awe. (Aaaaaaand maybe wondering why you swapped that 70w SON)

Medved
Hero Member
*****
Offline

Gender: Male
Posts: 4170
View Gallery

View Profile Personal Message (Offline)
Mar 24, 2019 at 12:39 AM Author: Medved
[quote author=suzukir122 link=#msg500874 date=Mar 23, 2019 at 05:27 PM]
UV rays can definitely pass through glass, but I'm pretty sure it depends on what glass is used. So if I'm correct, the glass with the
bulbs shown in this picture (as well as any typical fluorescent lamp) prevents most of the UV rays .../quote]


The glass lets pass some of the UV, but still by far less than the phosphor, even when in a standard thickness.
The thing is, the phosphor not only generates the light, but also it is absorbing it. So the phosphor (in normal lamps, not speaking about this) is only so thick, to get maximum light output. If it would be thinner, it does not convert that much of UV. But if thicker, it may convert more of the UV, but at the same time absorbs more light it generated, so the net efficacy becomes lower again.
But "just the optimum" thickness means still quite a lot of the UV passes through, way too much to be safe. To make the lamp safe, the bulk of the UV supression is in the tube glass. It is so, even no phosphor engineering samples have practically the same UV output as normal tubes, the phosphor plays a negligible role in the UV supression task.
That is about the short wave primary UV. For the longer wave (comare to the above) like UVB and UVA,the phosphor does notrespond to these at all, so plays no role at all, so whatever thickness, these UVs will be the same. So again, all job to supress these is on the tube wall material.


But back to the topic: Just seeing these semitransparent coatings may associate some new more efficient phosphor deposition (normally it is the bulk of the phosphor, what converts the UV to visible, but the grain boundaries what absorbs and difuse the light, so a coating without grain boundaries should give less absorbtion so allow for thicker layer to convert more UV), but the 1800lm/32W is clearly saying this is not the case here.

And regarding the quality of the old technology falling down when a new techno arrives: Any new technology, which just became the mainstream, is usually cheaper in the TCO than the older one, or it has other big advantage. That means the older needs to significantly drop its prices to remain attractive for at least someone (would you be buying standard 60W 750hr life rated incandescents for $3/piece?).
But the manufacturing usually can not be made any cheaper with the same product standard (the purchase of the machines may have paid off, but they still need the staffing, the room and eve because old, they startto break down more often or need more maintenance effort, so no significant saving there). So the only way is to "cut corners". And that obviously has its impact on reliability and/or performance.
So it is not intentionally driving the users off to a new techno, but just to compete on resale price.

But still I see this as strange: Aren't there any EPA efficiency standards prohibiting sale of lamps below certain performance?
Or the standards are worded so poorly there is such a loophole allowing really poor lamps to pass (something like "above 2000lm" being a threshold for whenthe limits apply)?

No more selfballasted c***

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 24, 2019 at 04:34 AM Author: Powergroove
Hey xmas, your data is skewed. T5 are rated on electronic ballast. T8 and T12 are on magnetic. That gives them a 10% advantage. Rate the T8 on electronic and that would be 3300 lumens at 32w smoking the T5 garbage. The philips T12 advantage series would make 100 lpw if it were rated on electronic.

Keep government out of the lighting industry.

Binarix128
Newbie
*
Offline

Gender: Male
Posts: 46
View Gallery

220V AC 50Hz


UCOUT2noI2R__jgPSJUjGRtA
View Profile Personal Message (Offline)
Mar 24, 2019 at 07:16 AM Author: Binarix128
This lamp is a bit dangerous . I can pass some UV A.

-I dont speak English very well. Compact Fluorescent (PL)
-Say NO to incandescent bulbs ban! Incandescent Lamp
-lamp saver Mercury Vapor Lamp

Binarix128
Newbie
*
Offline

Gender: Male
Posts: 46
View Gallery

220V AC 50Hz


UCOUT2noI2R__jgPSJUjGRtA
View Profile Personal Message (Offline)
Mar 24, 2019 at 07:17 AM Author: Binarix128
This is the most commented post?

-I dont speak English very well. Compact Fluorescent (PL)
-Say NO to incandescent bulbs ban! Incandescent Lamp
-lamp saver Mercury Vapor Lamp

Daniel f
Newbie
*
Offline

Gender: Male
Posts: 0
View Gallery

in my house is not used led and if I can avoid it


View Profile Personal Message (Offline)
Mar 24, 2019 at 08:13 AM Author: Daniel f
thanks for explaining very well. It is a great fluorescent to see how it really is. I called my attention!
xmaslightguy
Hero Member
*****
Offline

Gender: Male
Posts: 779
View Gallery

^homebuilt fixture


GoL ATL
View Profile WWW Personal Message (Offline)
Mar 24, 2019 at 10:24 PM Author: xmaslightguy
Quote
Hey xmas, your data is skewed. T5 are rated on electronic ballast. T8 and T12 are on magnetic. That gives them a 10% advantage. Rate the T8 on electronic and that would be 3300 lumens at 32w smoking the T5 garbage. The philips T12 advantage series would make 100 lpw if it were rated on electronic.

If that's true, sounds like someone out there's playing numbers games on the ratings of those things...

Though I personally wouldn't consider the better T8's which would then be 103 lm/w to be "smoking the T5s" since average T5's are in that same just over 100 lm/w range. .. .I'd simply call it "an even match".

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 25, 2019 at 04:30 AM Author: Powergroove
There are those T8's rated for 3050 and 3100. With the 10% advantage of electronic ballast that would be 3355 (104.8 lpw) and 3410 (106.5 lpw) respectively. Not to mention the lamp holders for t5 get baked when a lamp goes out.

Keep government out of the lighting industry.

HU112
Newbie
*
Offline

Gender: Male
Posts: 22
View Gallery

Chester


View Profile Personal Message (Offline)
Mar 25, 2019 at 06:46 AM Author: HU112
Interesting... the European triphorphor 36W T8(drop-in replacement for 40W T12) has a higher lumen rating than the American F32T8.
F36W/840 is rated at 3250lm, while F36W/33 is rated at 2850lm.

No more cheapy crappy Chinese junk, please.

xmaslightguy
Hero Member
*****
Offline

Gender: Male
Posts: 779
View Gallery

^homebuilt fixture


GoL ATL
View Profile WWW Personal Message (Offline)
Mar 25, 2019 at 08:35 PM Author: xmaslightguy
Quote
There are those T8's rated for 3050 and 3100.
The good stuff in other words .. probably not something you'll find so easily in stores

Quote
Not to mention the lamp holders for t5 get baked when a lamp goes out.
Depends on the ballast's EOL protection, if its more sensitive it'll shut down before any issues like that occur.
I'm sure lampholders getting baked is more of an issue with the cheap little things I see on modern T8 fixtures (& instant-start).. unlike the 'real' lampholders on older T8/T12 that could actually withstand such use/abuse.

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

Powergroove
Newbie
*
Offline

Gender: Male
Posts: 26
View Gallery


View Profile Personal Message (Offline)
Mar 26, 2019 at 05:15 AM Author: Powergroove
Happens all the time in the T5 fixtures where I work. Those F54T5 run hot any way. Even if the lamp hasn't reached eol the lamp holders will crumble after about a year or so. We have been removing these because of this issue. Every now and again a t8 will melt a lamp holder but T5 just bakes them to powder when trying to relamp. Never had an issue with T12 melting and baking the lampholders even T12 VHO. T8 has also been known to break at the failing end and the lamp fall out. I will sacrifice 6 lpw for something that is reliable. Just because government and manufactures want people to use what they see fit doesn't make it a superior product. More times than not it is just smoke and mirrors.

Keep government out of the lighting industry.

streetlight98
Sr. Member
****
Offline

Gender: Male
Posts: 323
View Gallery

Mike McCann


GoL 88219189@N04/albums
View Profile WWW Personal Message (Offline)
Mar 26, 2019 at 04:44 PM Author: streetlight98
Those t5ho lamps really do run scorching hot. They dim pretty badly over the course of their life too.

To resist is to piss in the wind, anyone who does will end up smelling.

xmaslightguy
Hero Member
*****
Offline

Gender: Male
Posts: 779
View Gallery

^homebuilt fixture


GoL ATL
View Profile WWW Personal Message (Offline)
Mar 26, 2019 at 08:36 PM Author: xmaslightguy
Oh yeah the HO T5's do get hot!
I've had no problems with mine (knock on wood ) - Other than one lampholder where the center part got jammed up.
I have a feeling that overall the normal-output T5's will hold up better, just because there's less heat involved. (so far no problems with those either)

But I also have no intention of T5'ing everything either...there are plenty of T8's & T12's around the house that work just fine as is.
I like the T5 HO's as plant-lights because they're bright & take less space.

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

Lightingguy1994
Sr. Member
****
Offline

Gender: Male
Posts: 374
View Gallery


View Profile Personal Message (Offline)
Mar 26, 2019 at 10:07 PM Author: Lightingguy1994
I think I'd stick to using F28T5 if I ever went with those
streetlight98
Sr. Member
****
Offline

Gender: Male
Posts: 323
View Gallery

Mike McCann


GoL 88219189@N04/albums
View Profile WWW Personal Message (Offline)
Mar 27, 2019 at 04:18 AM Author: streetlight98
Yeah any normal output t5 I've seen shows no signs of running hot. T5HO seems like an attempt to take over hid lamps in hi bay and low bay applications.

To resist is to piss in the wind, anyone who does will end up smelling.

© 2005-2019 Lighting-Gallery.net | Powered by: Coppermine Photo Gallery