Quote Originally Posted by howie66
Hey brooke, I use a 600watt HPS. And currently its about 2 feet above the plants. The fan runs at 45 mins ON 15 minutes OFF. Do you think I should have it running contstantly? Its spring here in Oz atm, so nice warm weather during the days, but gets very cold at night, and if I run the fan all night it gets down to like 62-65F. To cold thats why I leave the fan off for a while so the temperature gets a bit warmer.
62-65 degrees is just fine, your plants will love it. only reason my temps aren't at 65 is because they leveled at 73 and stayed there, so that was good enough for me.

love, brooke

ps, plants will sustain temps as low as 40f at night without probs (outdoor growing exp). as a matter of fact, if you want your plants to change color at the end of flowering, lower temps to 50-55 degrees f. they'll get all perdy and red/purple/blue/pink. realy cool!

love, brooke