wrote in message
ps.com...
I just changed my recessed 2- 4ft light fixture in my kitchen for a
4-4ft light fixture, actually it is 2 separate light fixtures wired
together with 2 tubes and a ballast for each. When I turn them on, it
is perfect lighting for about 30 minutes and then the flickering
starts. It produces a pretty good light show. Please help.

DannyK

All 4 bulbs flicker, despite being separate fixtures?
Don't know, but it sounds like maybe you have the wrong bulbs, or got two
defective fixtures.