Temp & Humidity

Basically I've built myself a grow room inside a loft which I've just today potted the seedlings and put inside the grow box. My only concern is it's obviously hot up there and at the moment is 31.1 degrees and the humidity is at 35% near the top of the cuttings. I know these numbers ain't bang on but will it really have a big effect on the final result if these aren't kept at the exact temperatures and humidity.

I'm using a 600w hps and there are 10 cuttings. I've also got an intake fan and a fan blowing over them and a fresh air hose to the side which goes outside bringing some cool ai in! The outside temperature today is around 15 degrees so obviously it should fall within the 27-30 degrees Mark throughout the night but will this at the moment have an effect on them. They've only been under for 3 hours so in another 15 it's going to be more like 37-40 up there!!!

Help......

100 views and not 1 reply??

too hot. you can grow in the heat but it effects the density of the bud which kills your yield. Light airy buds that crumble into dust. With 15 (59f) degree air outside, aircool your lamp and then do enough air exchange with the outside to keep yourself in the 25-28 (77-82.5f) degree range. shit 15 degree air should be able to handle all of your needs.