Depending on budget you could also use light movers to your advantage. Lumigrow's are designed and built in the US. They're also used in agricultural green house setups. (
http://www.lumigrow.com/aboutus/case-studies/?utm_source=icontact&utm_medium=email&utm_campaign=Pilot Fall 2014 ) 5 year warranty and can be used with automated equipment. Adjustable spectrum, and BEEFY heavy ass heat syncs.
I got a Lumigrow 650 pro right before HC flipped the rules and switched to an LP system. I was hoping to get a Dr. to sign, but here we are, injunction and all. So for the time being it has been used as a starter light for my vegetable garden. They're also a company who doesn't BS about their wattages. Meaning saying something is a 600W when it actually draws like 350W from the wall. The 650 pro pulls a hair over 8 amps