You should get one of those Co2 PPM meters for your room, And a nice timer of course. They have manual Co2 checkers for $9.00 and it is + or - 40ppm. good enough b/c it should avg. around (i forgot) 2000-2500 ppm (i may be wrong here, its in the bible) only while the lights are on of course. off topic but whatever. 70F-75F for sure is optimal.