I purchased a used setup with 2-24 inch vho lights 75w each and 2-36 inch vho lights 95w each. total watts =340(4bulbs). I was told I could get a ballast from home depot and I would like to know if anyone is familiar with the hd ballast, because the Icecap is expensive. If I had to use icecap could I use the 430(320watts) or do I have to use the 660 (440 watts). Thanks