Awasome 4 Bulb Fluorescent Light Fixture Slow To Come On Ideas. Our kitchen fixture won't come on for 3 to 5 minutes when the temperature goes over 90°f (32.2°c) and 90% humidity. The option is to open the fixture and check the ballast.

My fluorescent light won’t turn on sometimes: Web when one or more fluorescent light fixtures are humming or flickering or if the light simply won't turn on, the problem may be something as simple as a bad fluorescent bulb. Bulbs are the most common problem with a bad fluorescent fixture.