Hey GC, So just bought a T5 setup so I can keep some plants in veg, while the others are in flower. I got 4×T5 24w 6500k Blue Spec. How close are these suppose to be?
As low as you can without heat affecting plant,with proper ventilation those lights tent to run cool and you could go as close as 1 inch just put you hand between lights and topnof plant if it dosent burn then your fine look at my first grow https://forum.grasscity.com/index.php?threads/1429501/