How far do you keep a 1000W MH bulb above your plants?:fire:
mtgeezer Well-Known Member Feb 14, 2013 #2 Bare bulb, air cooled or water cooled? Your height depends more on the heat emitted but the closer, without damaging, the better.
Bare bulb, air cooled or water cooled? Your height depends more on the heat emitted but the closer, without damaging, the better.
BleedsGreen Well-Known Member Feb 14, 2013 #3 Place your hand an inch or two above your plants for 90 - 120 seconds, if it feels uncomfortably warm then your lights are too close.
Place your hand an inch or two above your plants for 90 - 120 seconds, if it feels uncomfortably warm then your lights are too close.
