first off set the light high put your hand by top of the plant and if warm that is good not hot then work UP or Down from there. I have a H I D 400 and H P S 400 on plants at same time it is about (( 4-6 to 5. feet ))((135 to 150 CM )) over plants with Ventalation in and Ventalation out
litespeed Reviewed by litespeed on . HPS kill plants???? HELP Hi, yesturday i recive'd HPS 600W....i installed it in my closet with my plants...but after 10 minutes the motherfucker nearly killed my plants!!! i've set it on big distance from plants and it still kill them....what can i do pls? Rating: 5