Great, thanks for the info. I have been doing as Clandestine is doing. They grow to the glass and I bump the light up about 1-2 inches.

I took a temperature reading right from the glass and the glass itself was 85F. I don't feel in danger of burning anything at that low level.
RoundEye Reviewed by RoundEye on . Never Too Much Light Situation: I have a few 400wt hps in my flower room. They are enclosed and cooled. A person can touch the glass and are moderately warm to the touch. Question: As long as there is no heat coming off of the glass, is it safe to let the ladies grow right up to the glass? This would put them roughly 4inches away from the actual bulb where they'll be getting a wonderful amount of light, cool to the touch even. I had read in Jorge's book that you can never have too much light. In my Rating: 5