When can I move light closer?

[Bree1978]

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 inches from hood it is about 88 with door closed, open it would be a little better)...

Well sorry for more q's....don't have much better than stress about them with this snow...lol...Thanks! :jointsmile: Bree

Bree1978 Reviewed by Bree1978 on 02-14-2007. 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

[dusto2k3]

LoL, its horrible to be stuck in a room with a bunch or plants.

My plants range from 18-14 inches(1KHPS). The closer the better., put your thermo at canopy height so you can gauge the temps at the canopy level.

[Bree1978]

78F is canopy height right now, 2ft away from hood...sorry if I did not put that clearly...But from what you are saying, go ahead and move it a little closer, say 6 inches? I only have 4 hours til' nite nite, so I could probably catch it quick. B

[dusto2k3]

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.

[Bree1978]

? I'm 24 inches from top right now.....? I wasn't going to go to 4inchs from top...lol. where did you get that? I'm 24 inches now, go ahead and try 18? still, laughing, although I might have read it wrong, i've had a few....lol

[Bree1978]

four hours was what time the lights go out......lol

[dusto2k3]

LoL, now im laughing..yeah try 16-20 inches, maybe even 18...

Just check the temp after you move it after about 30 mins, to let the temp even out, a good scientest would wait about an hour.

[Bree1978]

:jointsmile: Bree

[dusto2k3]

Just check the temp after you move it after about 30 mins, to let the temp stabilize, a good scientest would wait about an hour.

[Bree1978]

Done, noted, and thank you, :jointsmile: Bree