Here's a couple more links. one shows lumen output and HOLY CRAP! 6000 kelvin @ 20000 lumens! I'm no electrician but I believe that is alos @ 9.5amps which would be probably be pretty pricey to run. That being said the fixture being shown is for commercial use. http://www.lifi.com/pdfs/ProductBull...A-40Series.pdf
that 9.5 Amps is at 28V DC. the wattage, is only 266 Watts. And it's Watt's that the elec company charges us for, not amps. At 120v thats only 2.2 amps draw, or the equivelant as 1 250W electronic MH