Newbie questions for the win!

ALright, so i have my oldest plant right now, under CFL's and it is about 1.5 months old, veggin' out. 3 Days ago i switched my lighting cycle, to 24/0. All was fine, until today when i walked in to turn fans on, the sides of the fan leaves were curling in an upward fashion. it can't be heat stress...because i have CFL's, the room temp is a constant 70-76 degrees F.

Could 24/0 promote this curlage? should i go back to 18/6?

im really paranoid about this, because I already lost 1 female

are you sure your room temp is 70-76 or are you judging by your house temp? If you do have a thermometer in there are you measuring the temp at or near the tops of the plants? I just recently added (2) 42W CFL's to my very small grow area and it absolutely raised the average temp in the room 2-3degrees. I keep a daily log of all temps day/night. Not much on average but alot hotter within a couple inches of the plants, which is right where you need to have them in order for them to be useful lights.

probably should leave the fans running 24/7 with the lights.