About 2 1/2 foot should be ok, but if it burns your hand its too close.
LIP Reviewed by LIP on . Recommend height for MH lighting i have some seedlings starting i was reading that having ur mh light to low will fry ur seedlings and then having it to high causes it to stretch , from what ive read 5 feet is the norm, but i was wondering what u guys thought about 4 feet high for the seedlings and im not to sure after they start growing like during veg and bloom how high i should keep it. thx guys, my average temp is between 72-78 night and day so any help or suggestions would be nice, i know i gotta test it for my self as Rating: 5