Lamp height @ growth stage

Im not an expert but from what ive read whilst researching you need them as close as possible, about an inch or so. CFL's dont get very hot, so this is possible. Too far away and your plants will stretch I think.
 
What Bigby said....get the light(s) as close as possible, stick your hand between the bulb and the top of the plant...if its too hot for your hand, its too hot for your plant.
 
Mari said:
How high my lamps have to be from plant at growth stage (18/6) with 150W CFL?
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is it 150 actual watts or 150 equivalent (which would be a 47)

if actual prolly 4 to 6 inches away, if equivalent 1 to 2 inches

if baby seedlings double those numbers
 
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