Have 4 Bulb, 4 ft T-12 unit flush mounted (recessed) into vaulted kitchen ceiling.
About 10 ft up. Bit of a pain in the ass to work on.
3 of the 4 bulbs dead. I suspect ballast, but not sure. Possible bad tombstone.
We're running Type A LED tubes, but the three dead slots also don't work with standard.
OPTION 1: Call someone out to test/replace ballast and tombstones and keep running the Type A LED bulbs.
OPTION 2: Call someone out to rewire and bypass Ballast and start running TYPE B LED Bulbs.
OPTION 3: Is there a flat panel LED that is manufactured in such a way to mount and plug into existing recessed fixture?
I'm picturing something like these ones they have for can lights:
But shaped like this with the same dimensions of the 4 bulb T-12 Fixture:
I would prefer option 3, and it seems like someone would've invented a conversion kit by now.