They don't need any light before they sprout, i wouldn't leave them in the window tho incase they sprout and it's a very sunny day, it could damage the seedling if the suns very strong. Better to leave them in a in a more shaded part of the room or just in the dark.
I'd just have the temps the same as for the rest of the grow I don't think you need to adjust the temps. It usually takes mine between 1-3 days to pop their head out of the soil but it can take longer, maybe up to about 5 days.

Good luck!