http://www.erowid.org/plants/cannabi...rowlight.shtml
this should help get your figures together.
Cas Reviewed by Cas on . Few questions on lighting. Hey guys, I'm going to start my grow project in a few weeks but I'm still choosing which lights to place in my cabinet. I expect the cabinet to be somewhere around 40" high, 25-30" Wide and ~20" deep. I'm planning to place one 150-200 watt HPS blub and a 100-200 MH bulb (Also confused on the amount of lighting needed from the MH), so I did some searching and found this site for my HPS & MH: http://www.1000bulbs.com/products.php?cat=200-Watt-HPS Rating: 5