Johnny,
My advice to you would be, check out the wiring first-off, secondly check that you have the right sized control gear.
I assume that you are talking about Metal-Halide HID lighting?.
If not, could you please advise as to what type of lighting gear you are using.
With MH, the start current is the hardest part on the circuit wiring, we recently installed 48 250Watt lowbays in a shop, we had a multitude of problems.
Need extra advice, just reply!.