yes u can, but let me tell u dude, make sure that there is NO light leaks! meaning make sure absolutely no light is going to touch ur water! trust me my friend this will save u the problem that im facing now, my plants are seriously stunned and im on about 7 weeks into veg. im using led and cfls. plants were doing great till i bought the led which caused intense, light which leaked to my res and fucked my plants. algae will fuck u dude just sayin. i recommended a ufo with a quad spectrum and a couple cfls, u will benefit with no heat and less energy consumption