leaf curl from heat OR...? help![PICS]

I have about 6 square feet of growing space in a cabinet and a 400 watt cooltubed HPS beaming on 2 something week olds.

i had them in humidity domes and this was not a problem with 90-100% humidity; but now that theyre too big for the dome, some of the leaves are curling so that the serrations are curling up to touch.

Perhaps this is a heat issue with 90F inside the cabinet?

Perhaps this is a humidity issue with 30% humidity at highest inside the cabinet? (ive hung a soaking wet towel inside the cabinet, hope that will help)

or am i overlooking another variable?

hey man def heat stress you need to get that temp down asap, and def raise the humidity just a bit more around or at least 50%. hope this helps i am still on my first grow so i am still sorta new, but my is growing wonderfully lol

deviantboi said:

hey man def heat stress you need to get that temp down asap, and def raise the humidity just a bit more around or at least 50%. hope this helps i am still on my first grow so i am still sorta new, but my is growing wonderfully lol

Click to expand...

i just dont know what else to do to the cabinet; i the cooltube is nice and cool, i can put my hand on the glass while the bulb is on. I the ambient air temperature is just too high when the light is on.. for some reason. I dont have any oscillating fans in the cab...maybe not enough air circulation, so the air just sits and cooks?

Pump that air out of ur room man