how far to keep your lights is all dependent on your growing conditions so best bet is to put it about 12-15 inches away and keep an eye on it if it starts to burn move it up just slightly until you have the optimum height
you cant smoke the males cuz they dont make buds they make pollen sacs so unless it has a lot of trichomes to make hash its not even worth it i wouldnt even bother keepin the 2 males to make hash cuz by the time they are done you couldnt had a few weeks jump start on new plants
yep your nuts jk but you wont be able to tell the diff between male or female for at least a few more weeks as for the light it depends on a couple factors so what i did was just have it 20 inches and if they still looks like they are stretching lower it if they start burnin raise it until you...
my exhaust is a 4" 180 cfm connected to a home made 6" carbon scrubber keeps my box at 80 night and day with about a 3 inch passive intake the good thing about exhaust is if you have it at the right level it sucks the hot air out where as a intake can mix the air and push both cold and hot air...
air out is almost always better it takes stale air out and then just have a passive opening so it creates a vacuum and pulls fresh air in works great for my box
having it cooler is better 58 is too cold tho altho if you havnt already you should have had the lights running at night to keep it warmer and then during the day it would be cooler without the lights one of the problems ur lookin at rite now is possible hermies
should only raise it 15-20 30 max but it dependson your area its really not using as much energy as you think. space heaters, sound systems and lots of daily use electronics use more than that you are good to go specially with 12/12
12/12 will cause the clones to flower too you need a constant light but it doesnt have to be strong you could make a little growbox out of a rubbermaid?? just a suggestion