you gotta make sure to keep it well vented. i ran 2k in a tent once and it pushed 90s. 1k keeps it in a good spot. 600 you should be perfect.
what kinda set up?
for my setup for the summer i use the following
3 x 4" 8 bulb t5 HOs with mixed bulbs for vegging. i fucking love HO t5s for vegging. my plants go crazy under them.
for flowering ive been using a 2000 watt cool tube setup. lookin good so far.
dont use rockwool...everyone i know that used it had problems. they get too wet and soggy. put the jiffy pucks in hydroton. or even coco if you want to water less..
i have no idea what my yield will be on these ones. i vegged 10 of them under 2 4 foot 8 bulb high output t5. until they were about 5 feet tall. heh. bushy as hell too. i trimmed all the lower branches. if youve ever seen that dude with the 2 HUGE jack herer trees. mines look like that.
all 10...