Youre asking for simple answers to a complex issue.... To begin with, Id rather have a t12 with a good reflector than a T5 with no reflector. Remember, 2/3rds of the bulb is pointed in the wrong direction.
As a rule of thumb, for lower intensity plants you need 15-20 watts per square foot; on the high end you need 20-25 watts per square foot.
This is an old reference, predates T5 but it is still by far the single best introduction into plant lighting I have ever read. Caveat, even it has it's limitations, and photosynthesis is only part of the puzzle.
Last edited by Av8tor1; 11-23-2011 at 03:18 PM.
Okay say I want to grow d. Indica with any species of nep. Is that possible?
I hate bugs. Carnivorous plants get me.
Depends on the Neps, not all have the same requirements.
I want it!!!!!
Originally Posted by Rob