Good 400 watt hps?

http://cgi.ebay.com/Digital-400-watt-HPS-GROW-LIGHT-400w-outperform-LUMATEK_W0QQitemZ400083252594QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d26d1f572

Just looking for one i want to increase the number of plants Umm ive got about 10 feet vertical grow room and about 3x5 feet of grow area. Is this a good idea? also is this too cheap of a price? most things that are too cheap usually end up being shit.

Oooor would it just be better to grow with cfls since i have limited grow space.
thanks!

http://cgi.ebay.com/Digital-400-watt-HPS-GROW-LIGHT-400w-outperform-LUMATEK_W0QQitemZ400083252594QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5d26d1f572

Yep, I got my lights from them...Shipping was a tad cheaper going through the company rather than through them on ebay, though, if you wanted to look. www.htgsupply.com

Thanks man!