do not have a lot of money to spend at all.any good lights I could get cheap. at homedepot that would work.
instead of buying 7 lights and using lots of electric powering lots of lights, wouldn't it make more sense to get a decent light to start with? have a look here - http://www.greenfinger-hydroponics.co.uk/products.asp?CLFNAM=LGTHID#GROBULB - uk i'm afraid but i'm sure you can find an american equivalent. anyway the bulbs at the top are cheap, and 160w. the light underneath, the envirolights, are cheap as well, and very low heat. invest that little bit of money and time at the start and i'm sure you'll be rewarded by your plants for looking after them so well
Home depot sells every thing you need to build an HPS or MH light, MUCH cheaper then buying a complete grow light.