For sprouts I'd go 24-25". Works fine for very young and even premature cuttings. 48" just sounds WRONG. Maybe that number is for a 1500 watt panel or a spider.
led is new to me -(an old timer) the kind K3 L450 was my 1st pick - it will be my next if I go with LED's having a heat issue with the 2 running in that area - have a fan (90 +) degree - need a bibber fan or ezchaust. I forget how to figure "cfm's" for a grow space to detreme fan output/size ( forumal is total ft x ?)
they recommend 48 to 56 inches and yes - 300 watt for germination
Please send it to me if there is a website I can refer to for those GH distances. Im working with the galaxyhydro 300 and it is currently 13-15" above my flowering plant. I still cant be so sure if this is on the count of light burn.
I didn't figure it for light burn just because sometimes the very top leaves would look fine while lower, older fan leaves would be the ones to shrivel and die.
I just looked at the page for that light on Amazon. Recommends 24" min height. I'd raise that sucker.
All I found was this and idk what it translates to
Shit!!! Kind of wish I would have known that about 3 weeks ago. lol thx for your help
18in is close enough to burn your plant. Of course temperatures play into it a lot but even if your temperatures are under control you can still sustained light burn. To me it looks like the temperatures are too high and the light is too close.
The temperature is beautiful. 76°F.
Are you measuring the temperature at the top of the canopy directly under the light? And are you recording your highest temperature with a record keeping thermometer?
Actually no. That reading was UNDER the canopy lol. But if light burn is a clear problem, then this must be another one all together ie: pH flux :(
