I only have a small 150w hps and i have to keep my plants about 8 inches to a foot away or the leaves will burn. Idk about the kind of heat a mh puts out.
I think the reflector i have makes hot spots tho.
The first thing I ever done years ago was in a make shift ramshackle thing I threw together, with a 150 HPS, god knows how old it was(bulb age) b4 my mentor gave me it.
anyhow, i digress... it was white Widow, and it floored myself and a couple of close friends... I always say that my first was my best,, anyone back me up on this... or did I hit lucky with clones, and mentor ???
happy adventures ....