I like to start the babies with the flores. 18 hours the first week. By the second week (clones) I start bringing them out to meet the real sun. An hour to start in the early am or late afternoon, than building up to all day in a few weeks. With the current daylight hours and weather changes they are now under a 400 HPS (2nd and 3rd weeks of veg in this batch) during the night and am, than outside for the sunshine. In a few more weeks they will be the height I like and I will leave them outside most of the time.

For me, this changing lite sources has not effected the cycles. I would think that keeping them in the window light would be very much the same. The time to do this does not matter as it is very short. Maybe 5 mins a day now. If I need to move them into bigger pots before taking them outside it will take more time, but again, not enough to bother me.