I thought that I had read in Jorge's Bible that you want to keep the light about 12 inches away from your plant. Even if you are at 12 inches then you would be getting some great lumens anyways. Your bulbs rating is taken at 12 inches from its glass. So my 600 has like 90k lumens and thats measured at 12 inches. I dont know about you guys but I am not that greedy lol, I am with secret on this one. I think that lower portion would not like the loss in light.
Veedubin Reviewed by Veedubin 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