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Just A Little Blackened?

Just A Little Blackened?

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Couldn't get a real great pic of this one...

but this still shows its got an interesting blackening pattern that goes some distance down the tube on one side. (the other end is EOL too, and even darker, but it doesn't have that long tale reaching down the tube)

(pic makes these appear brighter than they actually are. They're only glowing dim - like you'd get on a RS ballast)

S40CWXL.jpg FRY2.jpg BLACK1.jpg GE_CFL.jpg

Light Information

Light Information

Manufacturer:General Electric
Model Reference:F40WW
Lamp
Lamp Type:Linear Fluorescent
Base:Medium Bi-Pin
Shape/Finish:T12
Service Life:(dead now)
Electrical
Wattage:40
Voltage:93
Current:430ma
Optical
Color Temperature:3000k
Physical/Production
Dimensions:48"
Factory Location:USA
Fabrication Date:-unknown-
Application/Use:(aint much use now)

File information

File information

Download: Download this File
Filename:BLACK1.jpg
Album name:xmaslightguy / Dead Bulbs To Be (or has been) Recycled
Keywords:Lamps
File Size:53 KB
Date added:Apr 28, 2014
Dimensions:329 x 1024 pixels
Displayed:323 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-93353
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wishus
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Apr 28, 2014 at 08:43 PM Author: wishus
Definitely a weird darkening pattern going on there, xmaslightguy.
How is the fixture mounted, out of curiosity?

Interested mainly in discharge lighting (mercury, sodium, neon) and also old and unusual incandescents.

xmaslightguy
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zzz


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Apr 28, 2014 at 08:56 PM Author: xmaslightguy
Originally it was in a ceiling troffer type fixture(slightly modified from its original form)...
The long EOL 'tail' facing the fixture.

In the pic thats not even a fixture - just a board with ballast & lampholders mounted on it (basically what I call a 'test board' or 'test fixture')

Its All For The Christmas Lights...
And A Good Summer Thunderstorm!

themaritimegirl
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Florence


themaritimegirl themaritimegirl themaritimegirl
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Apr 28, 2014 at 09:12 PM Author: themaritimegirl
Wow!

Electrical Engineering Graduate
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DieselNut
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Apr 29, 2014 at 03:23 AM Author: DieselNut
Holy crap!

Preheat Fluorescents forever!
I love diesel engines, rural/farm life and vintage lighting!

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Apr 30, 2014 at 06:55 AM Author: eclipsislamps
I may be wrong but I suspect this lamp has been rectifying for a very long time with this end failing very slowly with not just the mercury migrating away from it, but also particles of the electrode too.

Keeping electrodes hot and gases ionzied.

xmaslightguy
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Apr 30, 2014 at 07:12 PM Author: xmaslightguy
@eclipsislamps: Yep it had been EOL for months in a light that got used every day...I knew it was 'dead' but never bothered to replace it (lamp was removed/set aside along with the 'good' ones when the fixtures ended up being removed for a re-model)

Lights in that room got multiple starts per day running anywhere from a few minutes to a couple hours each time
Ballast was a GE 4xF32 (this one) which has some sorta EOL protection, so once the lamp got to a certain point of dead-ness, It'd light when 1st turned on, then flicker a bit & fade out...

Its All For The Christmas Lights...
And A Good Summer Thunderstorm!

vytautas_lamps
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My idol is Mylene Farmer, deal with it.


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Feb 02, 2015 at 12:35 PM Author: vytautas_lamps
xmaslightsguy: can you make some pictures or videos of your homemade fixture you have as an icon on your comment table?

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 ;

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Feb 02, 2015 at 10:46 PM Author: xmaslightguy
@vytautas_lamps:
I've got some pic's uploaded here
Fixture Image 1
Fixture Image 2
Fixture Image 3
One of the endplates

I had planned to do a video (even have some parts for it) but never did finish. Still gotta do that one of these days.

Its All For The Christmas Lights...
And A Good Summer Thunderstorm!

vytautas_lamps
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My idol is Mylene Farmer, deal with it.


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Feb 03, 2015 at 06:14 AM Author: vytautas_lamps
Thanks!

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 ;

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