Oh, as a side note, we just moved and one of the new rooms had one outlet in it with a funny looking outlet. I replaced the outlet with a standard one; it had a black wire, a white wire and a ground wire; no big deal right? Well, suffice it to say I am not a sparktrician. When I plugged my 400w HPS into the outlet the ballast started humming like crazy. After about 15 seconds it started smoking and busted out in flames. I unplugged it and the smoke was sickening so I plugged in my biggest fan to blow out the smoke. I turned it on high and the force of the fan was incredible - still no clue. I sat the fan down in the doorway to blow out the smoke and there was a loud POP. Dead ballast; dead fan. When an outlet "looks funny", don't assume there is not a good reason for it. It turned out to be a 220v circuit.