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t8 eol lamp on hpf trigger start desklamp

t8 eol lamp on hpf trigger start desklamp

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This lamp at one point was flashing, but then after a while it stayed lit with brilliant orange flashing on the bad end. So much so to the point I found myself reaching for the plug! The lamp then went out, and slowly got dimmer and dimmer. Will no longer light, although it has vaccuum still, it seems. The electrode filament on the good end continues to glow.

IMAG0283.jpg IMAG0280.jpg IMAG0274.jpg IMAG0275.jpg

Light Information

Light Information

Lamp
Lamp Type:t8
Fixture
Ballast Type:hpf trigger start
Electrical
Wattage:15watts

File information

File information

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Filename:IMAG0274.jpg
Album name:suzukir122 / Lamps/ballasts
Keywords:Miscellaneous
File Size:227 KB
Date added:Dec 13, 2013
Dimensions:2050 x 1227 pixels
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URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-88575
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themaritimegirl
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Dec 13, 2013 at 11:54 PM Author: themaritimegirl
Time to finish it off on instant start! I have an F15T8 that is in pretty much the same state as this, and I'm getting a Fulham Workhorse 2 ballast for Christmas to have some fun with it on.

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suzukir122
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Dec 14, 2013 at 12:05 AM Author: suzukir122
Haha yeah I've heard about those Fulham workhorse ones. Im interested in those too so there's a chance I will buy one! I've got
two choices in terms of this lamp... I could kill it with my slimline advance ballast for two f96 lamps, or kill it with my ge bonus line HO ballast, also for two f96 lamps, high output though, of course! This trigger start ballast, however, provided quite a show! Even with the broken electrode filament on the bad end.

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don93s
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Dec 14, 2013 at 12:14 AM Author: don93s
I've had lamps do that too. It appears that lamp quit just short of vacuum loss but might have still leaked just enough contamination to go out. Me and Aaron were destroying some 34 and 40w lamps like that. The 34w went out with a hiss but the 40w went on for quite a while then suddenly went out with the one end still glowing from the filament. In the past, the only way I could re-light those is with a neon sign transformer which usually makes a yellow-pinkish glow and getting very hot because of the small amount of leaked air and probably oxidizes all of the mercury too.
dor123
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Dec 14, 2013 at 12:18 AM Author: dor123
If only the ends glowing in the lamp on trigger-start (Which is a rapid-start for lower wattage), so the lamp lost vaccum. It shouldn't behave such if it is still have vaccum.

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 230V, 50hz country.

themaritimegirl
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Dec 14, 2013 at 12:25 AM Author: themaritimegirl
Dor: The lamp can still have vacuum; the cathodes just don't have enough emitter to make the lamp strike an arc. It's a common EOL type on rapid start ballasts. It'll probably run for a little while longer if lit on an instant start. My F15T8 does the same thing on an RS ballast, but still glowed when I tried it on an IS lantern ballast. If it lost vacuum, then the still-intact cathode would have vaporized and burned out before this photo could have been taken.

You've got me curious suzukir122, do you know the OCV of this ballast? It sounds like a rather violent EOL! My LPF 14/15/20 RS has 225V OCV, and all it did on my F15T8 was rectify it until one of the cathodes broke, and now it does the same as yours.

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suzukir122
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suzukir123
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Dec 14, 2013 at 12:43 AM Author: suzukir122
Im curious as to what the ocv is with this ballast as well. I originally assumed it was only like 180v or somewhere in the hundreds. Not very high. But this happened and caught me off guard. I've done many eol experiments, and its very rare for me to reach for the plug in fear during eol shows. This was one of those times.

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

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