MH Ballast Power Draws

[Mrfish55]

I just upgraded to the 400w Vertex electronic ballasts and am happy so far, no noticible interference with anything. I plugged it into my fancy new electronic energy meter and I am only drawing 10 amps running 3 ballasts, estimated consumption is $0.64 per 8hr day which is quite a bit less than the 250w tar ballasts I was running. By my calculations the electronics will pay for themselves within 1 year of operation.