how close are the lights? I am not using a 1000 watt but have heard you can still put them a foot or two from the light . test with your hand is it too hot to keep your hand there, they should be as close as possible while avoiding heat damage . then you get fastest growth and best potency (uvc radiation) , I leave room for mine to grow too but I prop some up on empty pots if they are shorter its easier than moving the light up and down.