yeah, yours looks bigger than my case, and temps in mine would climb to 90* and more in a matter of minutes. with fans at full speed..ridiculous. haha. i ended up with one male, and i'm kind of glad. if they both were ladies i honestly don't know how they would've fit. and i also saw what a male preflower looks like. and the whole, 'males show signs of sex sooner than females' is pretty accurate. even though the male sprouted about 5 days later than the other one, it showed signs of sex almost a week before the girl. i'd maybe go with 6500k until a week or two after they really start to flower. the bluer light supposedly helps keep internode length shorter and helps reduce stretching. if you're really concerned with height, have you thought about lst'ing or maybe scrog?