Quote Originally Posted by davejnz
THe WH7 is rated at 220w.It would be able to fire another pair of PC's if you wanted to.Since your only gonna use 2 actinics,there's no reason to get the WH7 IMO unless you plan on useing it to fire 4 tubes.
I actually do want to run 4 tubes (I'm running a pair of 400W Iwasiks and 4, 7100K 65W PCs)......

but 65W * 4 = 260Watt? will that mean the bulbs won't output their max output?