Since CFL's are only effective 1"-3" from the plant, the mylar or reflectors really don't do much. I'd say you want to mount the lights around the plant, not just above; but the largest concentration of light should be directed at the largest growth, which is the top. As for direction, no clue... but you can probably see with your eyes how much light is on the plants when you orient the lights differently.
bigtopsfinn Reviewed by bigtopsfinn on . CFL question quick I have a simple question and im not even sure it if matters... When positioning your CFL's over the plants what way gives out the most light to the plant. straight up and down, or on its side, or maybe at a 45% angle? the space that it will be in will be lined with Mylar so i mean it will be reflecting all over the place but i just wanted to see if there was any real difference on how the lights put out light. Thanks for you time guys. Rating: 5