I've seen people do it but it burns your bulbs out a lot faster.
killerweed420 Reviewed by killerweed420 on . ballast and bulb queries i have a 600 watt ballast, was just wondering if i could put at 250w hps bulb where my 600w belongs and it being cheaper on electricity. as it would be still going through my 600w ballast. as im growing in a cupboard would change bulbs effect yield? :( plz help Rating: 5