Quote Originally Posted by masterjointsmith

another thought is light degrades by about half by my understanding for every foot it travels so it is important to keep the light as close as possible asuming you have your heat and coverage in check.

but hey do some research im not guarnteeing this information cus im pullin it from memory/ass and dont have any refrences hopefully some one else can hook ya up with another oppinion of the situation.
Light intensity decreases at a square.

Double the distance from the light source and you'll cut the intensity to 1/4