looks good to me wowgrow. your ballast need to be outside, becouse that produses heat and your tent will heat more up with that in it, so yeh out side with the ballast,
temps are very good!!!
ok about the timer, on the timer can you see the arrow pointing towords the numbers, that is the where it tels you the time, so if its 1am in the morning right now point it to 1 if its 1in the day point it to 13 you get my point, and dose little tini fingers all around the timer that you can put down or up are the set timer, so if you want the light off from 12pm till 4pm simplely put the little fingers down between 12 and 18, so the infgers down are the time that the light is of and the fingers up are the time lights are on, i hope you get it lol if not just hola back,
and what inch is your cooltube and fan?