I have a pair of recessed fluorescent light fixtures in the kitchen that I
think the ballasts are going out. The lights do not come on sometimes and
sometimes when it does come on it is very dim. Changing to new tubes did
not help.

I am not sure where the ballast is located and if it is a standard part I
can get a replacement for. The light fixture says:

Underwriters Laboratory
Recessed Fluorescent Fixture
Issue No. A-540 508
U 880542
118 Volts 60 Hz

It is 48"x12" in size with two tubes.

Any idea how I can locate and identify the ballast?

Thanks,

MC