64 Degrees is no problem man, at all.
What your issue is going to be is, when those lights go off... temperature is going to drop.
My idea why you want to start outside, is obviously it's a cold climate.. you and your damn 64F
Its good though bro. No clear cups, nice and close, I do perfer getting the more "blue" bulbs 5500k/6500k.
6500k is recommended!