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Epic f4t5 EOL

Epic f4t5 EOL

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This came out of an cheapo closet light from Goodwill. Taking the unit apart, I could see that the lamp wasn't designed to be replaced. Of course, I "fixed" that by using some force to get the lamp out. It had one end very blackened (seen here) and the other wasn't. I hooked it up to a 20w CFL ballast and got quite a show of flickering, ends glowing red hot, and extreme end banding (the ends now look kind of like the inside of onions). I have a video, but no youtube account right now, so I can't upload it, but it was pretty spectacular. After the lamp died, it had made the wood it was sitting on get somewhat darker than it was before. This was putting out a massive amount of heat too, almost as much as a 60w incandescent. What's weird is that as the lamp died, the color temperature got warmer. Any ideas? This was the best EOL show I have ever seen (the 30w circline I killed was second).

SAM_1437.JPG SAM_1440.JPG SAM_1376.JPG SAM_1310.JPG

Light Information

Light Information

Manufacturer:Kelly
Lamp
Lamp Type:f4t5
Base:mini bipin
Electrical
Wattage:4, was being driven at 20
Optical
Color Temperature:got warmer as lamp died

File information

File information

Download: Download this File
Filename:SAM_1376.JPG
Album name:Lumex120 / Other
Keywords:Lamps
File Size:122 KB
Date added:Oct 02, 2015
Dimensions:2465 x 1848 pixels
Displayed:132 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-112275
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don93s
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Oct 02, 2015 at 03:58 PM Author: don93s
I've seen where as a lamp gets the electrode destroyed and the stem seal starts to melt with the swirly orange arcs, a slow enough air leak will cause the tube to suddenly glow yellow-orange as the air mixes in with the mercury/argon before going out completely.
Mercurylamps
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Oct 02, 2015 at 03:59 PM Author: Mercurylamps
The thumbnail looked like a HPS lamp arc tube about to turn orange during warmup.
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