Quote Originally Posted by Burrizzle
im not sure on wot height to have my light,its a 400w hps and im growing 3 plants big budda cheese,double dutch and kilo watt if that helps. if anyone knows for both starting them off from seed and when they are at the max height,cheers
Min. 2ft for seeds, atleast 18 - 24 inches for trees. If, you have a cooling source you could get closer to your plants, as close as a foot away. Try using the back of your hand to check the temp, that'll also give you an idea of where your lights are in reference to your plants.