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F14T12 Vita-Lite 97,000 Hrs

F14T12 Vita-Lite 97,000 Hrs

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While the electrodes don't show near eol yet, the phosphors are about shot! They are falling off the glass in the middle where it looks dimmer. Luckily it had an excess of mercury to also go this long.

The GE inside etch /CW has probably over 50,000 hrs but I forgot the date exactly when it was installed. Ballast is a 2x20w trigger-start HPF Universal from the 60's. This lights 24/7 since early summer '07.

003_1~28.JPG 018_1~3.JPG 005_1~26.JPG F96T12.jpg

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Filename:005_1~26.JPG
Album name:don93s / Various Lights
Keywords:Lamps
File Size:255 KB
Date added:Aug 21, 2018
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Date Time:2018:08:21 18:25:10
DateTime Original:2018:08:21 18:25:10
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fluorescent lover 40
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Lights are awesome! :)


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Aug 21, 2018 at 05:40 PM Author: fluorescent lover 40
Duro-Test (and also the GE in the back) = Quality stuff!

Power provider: Southern California Edison (SCE)

-Date decoder of some US lamps 1960-present.
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High Intensity
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Sylvania 100w /DX MV Cold Startup


GoL
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Aug 21, 2018 at 05:47 PM Author: High Intensity
I'm guessing what might happen to the Duro-Test lamp is the phosphors are going to wear out to almost unusable levels before the electrodes fail.

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

fluorescent lover 40
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Lights are awesome! :)


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Aug 21, 2018 at 05:49 PM Author: fluorescent lover 40
Maybe I should do a 24/7 life test with one of my Duro-Test Double-Cathode lamps...

Power provider: Southern California Edison (SCE)

-Date decoder of some US lamps 1960-present.
-Switch and receptacle collector.
-I'll save any vintage lamp! Smiley

Lightingguy1994
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Aug 21, 2018 at 06:17 PM Author: Lightingguy1994
Wow they really passed the 'test' on quality
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Bottled lightning


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Aug 22, 2018 at 02:24 AM Author: Cal

I'm guessing what might happen to the Dero-Test lamp is the phosphors are going to wear out to almost unusable levels before the electrodes fail.


I’d say so. The cathodes don’t look anywhere near shot - nice banding though.
F96T12 DD VHO
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Aug 22, 2018 at 05:22 AM Author: F96T12 DD VHO
Maybe I should do a 24/7 with my GE F8T5 and see what happens.

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Cal
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Bottled lightning


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Nov 01, 2018 at 02:26 PM Author: Cal
Ah, here we go.

Please post at least a yearly update of this lamp! You might have the "centennial light" of fluorescent lamps!
don93s
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Nov 02, 2018 at 03:52 PM Author: don93s
Yeah, still going! Unbelievable for 14w lamp.
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Nov 02, 2018 at 04:15 PM Author: Cal
I think there is a lot to be said for leaving good quality lamps running 24/7. I've seen modern cheap lamps die quickly even when run 24/7, but that's due to emitter loss and poor quality control. On an old lamp that is well made the less emitter is sputtered due to starting will theoretically lead to long lives. I guess even the GE behind that has done 5 years (?) is testament to that, although shame it hasn't banded.

Are you going to run it until death or are you going to concede defeat and take it out before that? The way the bands have formed is sublime and I imagine are visible now even when it's powered off.
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Nov 02, 2018 at 04:32 PM Author: don93s
I'll just leave it in there. GE lamps are funny in that sometimes they band and sometimes not. Some of their lamps will band much easier on preheat too.
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May 18, 2019 at 07:25 PM Author: Cal
This must now have surpassed 100,000 hours. Does it still run?
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May 27, 2019 at 09:43 PM Author: don93s
Yeah, still looks the same as the pic.
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