This lamp had been in the production room fixtures for a very long time and one end had  a black spot the size of a thumb. That was NOT the end that went EOL. It's in RS service and I got irregular flickering and then it went on working. So I removed it to finish it off at home. Date code is EOE4 with the first E underlined. Any one ? What's the date on this one?


Powell

thats a long life man! the lamp was mfd in august 2000 at the versailles, ky fluorescent plant.

Other (GE) bulbs came and went and this one held on for years.

I took it home. It burned in ONE side of the 1950's preheater, the other side it would just blink and go out when I removedt the starter.  It burned for an hour and started doing orange and purple at the EOL end and it finally went out, and just blinked. So I moved to a HPF single 40 watt ballast I got some swirling and orange. It finally just went dim. THEN I went to the solid state ballast for 25,30,34 and 40 watt lamps. It went a long time and I got soem very violent swirling and BRIGHT orange. It settled down again and finally SSSSSSSSS.  It wasn't very orange at the time. It removed phosphors in a round circle, and with an LED flashlight I saw it had melted part of the wires that held up the filament on one side and had actually moved them out wider......