latewood
02-15-2007, 08:26 AM
For HID lamps. (Metal Halide-MH, High Pressure Sodium-hps)
1) Place your hand (palm down) at top of canopy.
2) Lower light until you cannot stand the heat for a full minute...once that distance is determined...
3) Raise lamp 2" and keep that distance consistent throughout grow.
Note: Always have a fan dedicated to the airspace between the lamp and canopy, and you will be safe. An oscillating fan is necessary to circulate air.
1) Place your hand (palm down) at top of canopy.
2) Lower light until you cannot stand the heat for a full minute...once that distance is determined...
3) Raise lamp 2" and keep that distance consistent throughout grow.
Note: Always have a fan dedicated to the airspace between the lamp and canopy, and you will be safe. An oscillating fan is necessary to circulate air.