CFL's are definately the way to go for the stealth grower. I originally bought a 400w HPS with an open face (non coolable) and it sure did put out a lot of light but also put out WAY too much heat for a cabinet. I changed over to CFL's, got the biggest wattage I could find, and placed four in my cabinet which holds 2 plants and have produced some very beautiful buds. Take a look at my gallery if you wanna see some CFL results.