wow...lots of good reading! Wanna start an 8x8 shed for grow room, want to start w/ four plants indoors soon. thinking of getting 4 clones; 4' T-5 light with 8 bulbs. would like to open shed up during day for natural light/ventilation/ while still leaving T-5 on. my biggest concern is maintaining temperature as it gets super cold at nite, and i believe t-5 don't let off heat. i know there's lots more to learn...baby steps for me. i have the space, i want to get lights and plants soon but thinking ahead. i want this 1 st grow to be done all indoors, i think i may need to get better lights? i still want to get t-5 for starting 2nd harvest of 6 plants which will move to outdoors in spring