Scott,
I picked up an inexpensive laser thermometer on ebay (about $30). So I can spot around on individual colas to see exactly how hot they are. I havenā??t had any heat stress keeping the max at 82ā??84˚. Real handy for res temps and many other things too.

HMR
Horsemanrocks Reviewed by Horsemanrocks on . distance from plants? HPS 400w Guys: I bought a HPS (400 watt) and my questions is what is the correct distance to keep the HPS light from my plants?? Just starting flower stage. Thanks for any input :) Rating: 5