I agree GateKeeper. I run 2 x 600 watt HID's at .14 /Kwh = 8.40 extra per month. So what, you had an extra AC or Space heater running.. lol. I had my electrician buddy wire me in 2, 240v outlets. If you have the resources it only costs about $100 for all the supplies, and the savings over 2 or 3 cycles is well worth it. Jus go to Lowes and get a 100w HID Security Light for about $75.