Here is a link to light fixture that really isn't as orthodox as a hood with MH bulbs. Is this a chance worth taking? They seem to know what they are talking about when it comes to the output stats.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2384632589&category=3186
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2384632589&category=3186