When determining whether or not a flourescent light fixture's ballast(s) are bad, what is the easiest way to tell? Is it a voltage test on the contacts? That would not seem to be it, as a ballast sends varying bursts of voltage to get the arc going inside the lamp, I believe....is it true that if a ballast is bad the lamps will not light up at all? I was thinking it may be possible to have partial lighting of new tubes as the ballast is going out...anyway, please let me know what tests and criteria you use in determing if a balllast has gone out. I am only an aprentice here, and appreciate all the great info from you long-time pros....
