I have a 2x65 watt dual current satellite system. One of the lights aren't working. I checked to see if it was the bulb and they were fine. does this have something to do with the ballasts?
check the endcaps where the ends of the bulbs go into (the bulb should be tight in the socket (endcap)). also check the wiring and heat issues where the ballast maybe adding a small fan can prevent this from happening if the ballast gets to hot