woah, 4" is close. I hear 73-78 is optimum, but if you can keep it cool, 6" would be great..

mine have gotten in the 90's too(summer), but i'm sure it hurts the yield.
dusto2k3 Reviewed by dusto2k3 on . When can I move light closer? I made a new thread, because I don't know when it will be read...when can I move my light closer...I've been flowering for 7wks under CFLS' (approx. 19000lu) and just moved them to a HPS (approx 50000lu). I started them with the tops 2ft away, today...temp there is 78F...there were in higher heat before I moved the room and lights. They look good and all, just want to know if that was the proper height to start with...to me, it seems I can put my hand much closer to the light. (about 12 Rating: 5