Quote Originally Posted by elimuir
Also, thanks for giving me the tip on the burn.
I think bashmans was referring to the nute burn (the brown tips on the end of the leaves) this is caused by your feed being a little bit too strong. Heat stress will show as a "lip" forming on the edge of the leaves.

You ask what height to put your light at but you don't mention what kind of light. I am assuming it is CFL, if you want some decent answers, provide some better information.