I have a 48" coralife pc light with 4 65watt bulbs I think I have all 4 lights are 50/50 believe the ballest went out in one set of lights they sell the ballest on amazon for about $40 I just don't have time to mess with it and already got new lights the bulbs are about 4 months old it also has 4 blue led moon lights. I am not looking for much probably just some corals or some thing.