How far away should you keep a 400 watt hps from the plants so that you don't burn them? Thanks!
Printable View
How far away should you keep a 400 watt hps from the plants so that you don't burn them? Thanks!
usual answer is 18" - 30", but that changes greatly if you are running a fan-cooled fixture, they can get much closer (you do lose some lumens when air is blown over a lamp, but hardly worth mentioning IMHO) ... I highly recommend fan-cooled lamps, and ballasts usually last longer in cooler environments, too ... :smokin:
All depends on the hood and air cooled or not .
Need a lil more info to be of much help . General noob rule of thumb is put your hand right at canopy height , too hot for you = it's to hot for them .
Peace
Crispi :jointsmile:
right on, thanks guys!