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

GTL3 germicidal lamp, running

GTL3 germicidal lamp, running

Click to view full size image

I've been testing this lamp on the Fulham Workhorse 2, and it runs just fine. Lamp current is 0.20A on one wire, and 0.31A on two wires, so pick your poison. Arc voltage is 11.1V at the lower current, and 9.3V at the higher current. All measured with an RMS multimeter.

It's a very pretty discharge - viewed from under a drinking glass, of course. When cold, the ends of the filament supports, where the discharge contacts, glow purple, and the cathode glows brighter than once warmed up. Startup takes several seconds, even on a ballast like this, due to the cathode always being in circuit and clamping the voltage. First the cathode warms up, glowing visibly red, then the discharge appears and ramps up in intensity, like a rapid start fluorescent lamp. The cathode loses most of its incandescence after a moment of running.

I've been running this for a couple of hours each day - first to test and make sure my drinking glass was blocking the UVC. My eyes don't hurt and I'm not sunburnt, so evidently that's fine. Now currently I have a piece of paper under the glass, to see if it will show signs of UVB/UVC exposure. Interestingly, you can see the paper glowing from the UVA. Paper placed immediately outside the glass doesn't glow. The smell of ozone is strong when you smell the inside of the glass.

I notice that only the ends of the cathode have the emissive coating. I assume this must be to encourage the arc to stay near the top of the supports, and not stray down near the base of the lamp.

I want to test this on a DC power supply and see how it responds to voltage and current variations, striking voltage, etc. I'll post another picture when I do that.

DSC00999.JPG DSC01121_2.jpg WP_20171127_14_19_49_Pro.jpg IMG_20170415_170517_359.jpg

Light Information

Light Information

Manufacturer:Uh?
Lamp
Lamp Type:GTL3
Base:E17
Shape/Finish:T7
Service Life:3000 hours
Electrical
Wattage:3 (0.16W ultraviolet output)
Voltage:10.5V
Current:0.3A
Physical/Production
Factory Location:China
Application/Use:Germicidal/UVC/Ozone production

File information

File information

Download: Download this File
Filename:DSC01121_2.jpg
Album name:themaritimegirl / Miscellaneous
Keywords:Lamps
File Size:337 KB
Date added:Nov 28, 2017
Dimensions:2048 x 1536 pixels
Displayed:157 times
Date Time:2017:11:28 22:50:32
DateTime Original:2017:11:28 20:51:26
Exposure Bias:0 EV
Exposure Time:1/50 sec
FNumber:f 2
Flash:No Flash
Focal length:8 mm
ISO:100
Make:SONY
Model:MVC-CD500
Software:Windows Photo Editor 10.0.10011.16384
White Balance:1
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-139785
Favorites:Add to Favorites
Comments
dor123
Hero Member
*****
Online

Gender: Male
Posts: 2559
View Gallery
Other loves are computers, office equipment, A/Cs


View Profile WWW Personal Message (Online)
Nov 28, 2017 at 10:27 PM Author: dor123
It is very dangerous to look at germicidal lamps. They can causes you eye and skin burns.

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the European date format (dd.mm.yyyy).

I lives in Israel, which is a 230-240V, 50hz country.

Lodge
Hero Member
*****
Offline

Posts: 878
View Gallery

18W Goldeye / 52W R&C LED front door lighting


View Profile Personal Message (Offline)
Nov 28, 2017 at 10:47 PM Author: Lodge
While it's a small lamp with limited UVC output, like Dor123 said UVC exposure is bad, please don't use your eyeballs or skin to test the UVC levels, you can destroy as much paper as you like, but save your eyes, honestly you can't just buy a new set from the local corner store, And you can also get very cheap Photochromic film which will change color when exposed to UV light, but yes simple glass will block just about all of the UVC light coming from it so viewing them through glass is generally safe..

And running that lamp on DC will work, but make sure you reverse the polarity every couple of starts / hours to prolong the life of it..
themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Nov 28, 2017 at 10:53 PM Author: themaritimegirl
That's why I view it from inside a drinking glass, which I mentioned twice.

Electrical Engineering Graduate
YouTube | Twitter | Instagram

tolivac
Hero Member
*****
Offline

Posts: 531
View Gallery

View Profile Personal Message (Offline)
Nov 28, 2017 at 11:33 PM Author: tolivac
There is a lamp like this in the brush sterilizer part of the my Philips Sonicare electric toothbrush.I saved the bulb from a Sonicare that died on me-the lamp is still good.These last a long time for brush sterilizing use-the cycle runs for 10 min.I don't think I would try to run this lamp on DC-don't think they were designed for DC operation.These are also similar to the UV bulbs that used to be used in dryers and WP washers.
rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 296
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Nov 29, 2017 at 06:12 AM Author: rjluna2
Very nice, Luke

Pretty, please no more Chinese failure.

589
Sr. Member
****
Offline

Gender: Male
Posts: 403
View Gallery

Knight of the D-line streetlights


589
View Profile Personal Message (Offline)
Nov 29, 2017 at 06:16 AM Author: 589
Yes and totally cool that you're using a WH ballast to do it!

Low Pressure Sodium

themaritimegirl
Hero Member
*****
Offline

Gender: Female
Posts: 892
View Gallery

Florence


themaritimegirl themaritimegirl themaritimegirl
View Profile WWW Personal Message (Offline)
Nov 29, 2017 at 10:22 AM Author: themaritimegirl
Who's Luke?

Electrical Engineering Graduate
YouTube | Twitter | Instagram

sox35
Hero Member
*****
Online

Gender: Female
Posts: 1171
View Gallery

Mainly the electrical side of things


View Profile Personal Message (Online)
Nov 29, 2017 at 10:33 AM Author: sox35

That's why I view it from inside a drinking glass, which I mentioned twice.


I look at quite a few things through a drinking glass, they always seem to look better that way

Ria in Aberdeen
It'll be all right in the end, and if it isn't all right, it isn't the end  Smiley

Mandolin Girl
Hero Member
*****
Offline

Gender: Female
Posts: 715
View Gallery

Mainly the mechanical side of things


View Profile Personal Message (Offline)
Nov 29, 2017 at 10:35 AM Author: Mandolin Girl

I look at quite a few things through a drinking glass, they always seem to look better that way



Sounds like a good idea to me.

Hugs and STUFF Sammi xXx (also in Aberdeen)

There are two kinds of light  -  the glow that illuminates, and the glare that obscures.
James Thurber  -  US author, cartoonist, humourist, & satirist (1894 - 1961)

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 296
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Nov 29, 2017 at 11:03 AM Author: rjluna2

Who's Luke?

Oops, sorry wrong person Trent

Pretty, please no more Chinese failure.

DetroitTwoStroke
Full Member
***
Offline

Gender: Male
Posts: 197
View Gallery

Luke


View Profile Personal Message (Offline)
Nov 29, 2017 at 01:25 PM Author: DetroitTwoStroke
I'm Luke - what did I do? It wasn't my fault, I swear!

Pride and quality workmanship should lie behind manufacturing, not greed.

rjluna2
Sr. Member
****
Offline

Gender: Male
Posts: 296
View Gallery

Robert


GoL
View Profile Personal Message (Offline)
Nov 29, 2017 at 04:52 PM Author: rjluna2
Sorry Luke and Trent I got your name mixed up.

Pretty, please no more Chinese failure.

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