>>820060I also made some chains out of fencing wire that I used to raise and lower the lights with when I was working with the plants and as they plants grew up. You have to keep the lights very close to the plants, less than two inches from their leaves. I'd usually wait until they reached to about 1/8" of an inch from the lights then raise the lights. I found that it was better to have all one type of plants under only one light because different types grow upwards at different speeds.