Odie they sell 4' led bulbs for under $10 each to replace the standard T8 ( https://www.homedepot.com/p/toggled...Tube-Light-Bulb-2-Pack-D416-65321-2/308086234) (the 1.5" dia x 4' bulbs). You have to rewire the fixture but that only requires you to cut the wires to the ballast. It can stay in place. Then wire the 120V line to the terminals of each bulb on one end. Cut all other wires. Shut the power first.I've had flourescent fixtures in my shop for the past 25 years, and frankly, a few of them are on the brink of failure. It's my plans to get LED fixtures, when that time comes to replace them......
-----odie-----
This doesn't require removing the old fixtures. Get bulbs that can be dimmed (cost a bit more) and use a dimmer.
Stu[/QUOTE]
Thank you, Stu........
I'm not sure what's wrong with my existing fixtures, but I've got five 4' double fluorescent lamps in the ceiling of my shop. Four of the five fixtures don't work on one of the two sockets. I've replaced the bulbs, but that's a no-go......still doesn't work......something is wrong with the sockets themselves (or could the problem be with the ballast?) These existing fluorescent fixtures have been in constant use for about 25 years. I figure when I run out of replacement fluorescent bulbs, I'll start replacing the fixtures with the LED lamps. I think there is still about 4-5 new fluorescent bulbs in my stash, so will keep replacing them as they burn out.
I'm not much of an electrician, but I do know enough to cut the power when I mess with electrical things.....
-----odie-----