I use Phillips ballast 120/277 volts with T8 lamps and have no problem. I work in a hospital and maintain all interior lighting (68,000 lights).
Does the gym by any chance do a cold start of the lamps each morning, or is the interior temperature kept up (50F or more) during the night.
Originally Posted by ghelec
From what I have heard these particular lamps do not cold start very well and that could be causing extra strain on the electronic ballast. A magnetic ballast would be less sensitive to starting problems and lamp flickering, but might still be damaged.
Does the fixtures have a good ground.
Originally Posted by GoldDigger