i some times stretch in the first week of 12/12. so when they have stretched the buds arrnt as close together. but thats just me, it seems to help, i think,
but 4 foot is too much. my lites are normally 1foot, from the top of the plants, but when i want to str. i just move the lite or plants 1 3/4 foot or 2 foot. for a week. 4 foot is kind of too much. your plants will get leggy and fall over.
what lites are you , wanting to use?.