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Restore Find - Drop dish fluorescent
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I didn't buy it but thought it'd be interesting to share this one. A 2x2 recessed drop dish troffer showed up at Restore recently, seems like it was originally mounted in a plaster or drywall ceiling. Anyway it's looks to be quite old, perhaps early to mid 60s from the cloth wiring on parts of the ballast. Also interesting is the HPF 4 lamp F20T12 trigger start ballast. I guess this light is old enough to predate the use of 2 F40BT12s (U bent F40s) in these type of fixtures, I think those only started to become popular in the 70s. I prefer the 2x2 lights with 2' lamps though.
Interestingly all the newer 2x2 fixtures are 2 or 3 lamp 2' T8/T5 instead of using F32BT8s. I guess 2' lamps won out partially due to how fragile the U bent T8s are and the slight energy saving from using 2-3 lamps.
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Oh wow I didn't even notice the ballast was 4-lamp. I assumed there were two 2-lamp ballasts, one at each side.