400w eats up about 9 amps @ 120v. Yes it's expensive to run lights.

Just tell them you have several computers running for school for a project and they run 24/7
Zandor Reviewed by Zandor on . Electricity problem.. HELP!!! Hi.. I don't know how this could be, but here it goes.. The electricity company called today, and told us that in 2004, we used 4000 KwH, and in 2005 it was up to 10000!!! How could this be??! Could a HPS use THAT much in electricity? Rating: 5