A lot of people run 13/11 and some even run 14/10...it's all based on preferance and experience, try 'em out and see which one works best for your plants.

Light isn't everything when it comes to yield either, it plays a large part...but again it gets complicated.

Do some research here, and try it out for yourself
SunnyD Reviewed by SunnyD on . 12/12? does everyone here run flowering rooms with 12/12 lighting exactly? Rating: 5