Sylvania F6T5 fluorescent lamp etchFluorescent0511/22/20 at 22:09Fluorescent05: Cool!	Sylvania F6T5 fluorescent lamp etchFluorescent0511/22/20 at 22:05fluorescent lover 40: May 1971 I believe.	Sylvania F6T5 fluorescent lamp litFluorescent0511/22/20 at 22:03Fluorescent05: I don't know why it says preheat on it. It'...	Sylvania F6T5 fluorescent lamp etchFluorescent0511/22/20 at 22:01Fluorescent05: Yeah I was thinking 60s or 70s.	Sylvania F6T5 fluorescent lamp litFluorescent0511/22/20 at 21:33LampLover: Oh so it is a rapid start ballast for Preheat lamp...
Sylvania F6T5 fluorescent lamp litFluorescent0511/22/20 at 20:56Patrick: It is curious that it's labeled both Preheat B...	Sylvania F6T5 fluorescent lamp litFluorescent0511/22/20 at 20:44LampLover: I hate to sound like an idiot but this says "...	Sylvania F6T5 fluorescent lamp etchFluorescent0511/22/20 at 20:26Patrick: I don't know how to date these precisely, but ...	Sears F15T8/CW litFluorescent0508/27/20 at 18:39Fluorescent05: How old is this?	105 watt CFLFluorescent0507/14/20 at 17:23Fluorescent05: This is probably about as big as a 400 or 1000 wat...
105 watt CFLFluorescent0507/14/20 at 14:50ace100w120v: I've even called the early CFLs, i.e the prehe...	105 watt CFLFluorescent0507/14/20 at 14:07streetlight98: If properly ventilated these will last decent. The...	105 watt CFLFluorescent0507/14/20 at 09:30Fluorescent05: This is just a cheap Chinese one. Are yours of bet...	105 watt CFLFluorescent0507/14/20 at 00:56app87k: I have four units like this. But mine are all spir...	It works!Fluorescent0506/08/20 at 00:05suzukir122: Awesome, but I bet that top lamp is gonna be EOL v...
It works!Fluorescent0506/07/20 at 21:07Powergroove: Good deal.	Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 15:02Fluorescent05: Either that or 75. There looks like there could be...	Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 15:01High Intensity: It's made in 1976.	Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 14:58fluorescent lover 40: There is a date code, I'm not sure if I'm ...	Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 14:57Fluorescent05: So it doesn't have a date code?
Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 14:39fluorescent lover 40: Never mind, I made a mistake. Sorry.	Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 14:37Fluorescent05: Why does it say USA in the middle instead of a num...	Westinghouse Blackender F40CW Lamp EtchFluorescent0503/23/20 at 14:32Fluorescent05: Is this from some time in 1976 due to there being ...	F24T12 slimlines - good vs. defective on arrivalFluorescent0503/02/20 at 05:52Fluorescent05: They are so expensive and my parents don't lik...	Sylvania F20T12/CW lampsFluorescent0503/02/20 at 05:50Fluorescent05: So a factory code?
F24T12 slimlines - good vs. defective on arrivalFluorescent0503/01/20 at 19:00fluorescent lover 40: Do both.	F24T12 slimlines - good vs. defective on arrivalFluorescent0503/01/20 at 18:59Fluorescent05: I still have both of these, even the EOL one. Mayb...	Sylvania F20T12/CW lampsFluorescent0503/01/20 at 18:58fluorescent lover 40: Danvers, MA.	Sylvania F20T12/CW lampsFluorescent0503/01/20 at 18:40Fluorescent05: What does the A mean on the date code?	Dead Philips ALTO lamp glows GREEN near a blacklightFluorescent0511/30/19 at 22:12ace100w120v: 2600K...

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