With hps lights,keeps the distance about 18-24" with seedlings.Another way to judge the distance is to test the heat with the back of ur hand,if u find it uncomfortable move the light up.Remember thats these plants will be under the lights for 18-24 hours.
mrxthethcman Reviewed by mrxthethcman on . New lights, setting up, help. Hey guys, im setting up my light. How far away should I keep it from the babies? In the begining, and the future? Its a 400 watt MH/ HPS convertable. Long narrow area. Im going to hook up a little chain so it will be easy to move it. Thanks! Rating: 5