Hey B...top of the day to ya brotha. With your LED's...If you keep them 20-24" away you will be safe and still get most of their intensity to the canopy. Right now....just so ya know my LED is about 30" + away from these Desfrans and they think that is plenty...I can tell,they're not stretching for it or looking for it...know what I mean? they're real happy at that distance. My main light is a Budmaster2,675xg (Bid's test light before he passed....R.I.P. )fyi. When I flip and go to 12/12 I turn on the two G8(Dorm Grow) 240w,b's and the two G8(Dorm Grow) all red 90w,ufo's. The room has plenty of the right kind of light for my style of growing ,which is fewer /bigger plants.Cheers B and have an awesome weekend....Duggs.