Heads Up
Well-Known Member
Can anyone give me a general idea on how far - typically - one can expect to space a 600W HPS from the tops of a plant without an aircooled reflector/cooltube in a 8 sq ft, 4' tall tent? Room is A/C cooled, tent will be vented by means of 2 X 4" inline fans @ 80 CFM... 18"? more, less?
Put your arm under the lights at the canopy level. If in ten seconds you think it's too warm, so do your plants.