OK, I'm working on the lighting for this beast. I have 4 Coralvue 400W ballasts, and 4 400W fixtures - they are about a year old (they were mikeyboy's). I'm only going to use 3 of them, at least for now. I've put outlets in that are protected by GFCI. However, here's what happens when I plug them in:

1 ballast works fine, but the fan(s) don't kick on
2 ballasts blow the GFCI. They work if I plug them into a non-protected outlet. I do notice that the fans are a bit loud...

The GFCI is rated for 15 amps - and the ballasts are 3.5 amps each.

Any ideas?