It would be ideal if you can keep the temps down. You could even cram a 1000 in there. Heat is the only limit so that's why I suggested a cooltube. There are DIY methods to make a cooltube and batwing if the retail ones seem too expensive for your liking. The batwing lets you adjust the focus of light spread to maximize light in your space and the cooltube part lets you get the light way way closer than normally possible for incredible growth and penetration.

If you want to look up DIY cooltube just search on "bake-a-round"

On ebay they sell for $10 or so, maybe $20 with shipping, then it just takes a few little bits to make it work.