I veg with a hps and i get stems as fat as fingerz
i have 3 100 watt hps lamps and they put off almost zero heat. im able to put them about 5 inches from my plants with no prob. i would never do this with a 250 or up though. the pic i posted shows them about 5 inches farther away than i usually keep them. i moved em back because i got a 2 tube 4 ft floro above it and two more 4 ft floros beside em. my issue is keeping the closet warm enough so that it doesnt hit 50 f or they stop growing.