can't help but notice the ends of your leaves turning a little crisp...watch out as it seems your room os a little on the warm side..or the light is a little bit too close...im guessing you already noticed that..lol..
i'm currently getting set up to get growing too, got 12 plants from seed, white widow, and i am going to use the screen as well...i herd that you should only let the screen get about 40-50% full as it will continue to fill furing the flower stage? any truth to this?