If you are going to change the light cycle 24 hours of darkness is the way to do it. However, I have done the same thing myself and half the plants hermaphed. I really wouldnt recommend changing the light cycle. Especially not while your in flower. What I would do if i were you is keep the plants separate and just take both of your 150 watt lights and put them both over one set of plants and then keep your 400 watt light on the other set. Like i said you could try to change the light cycle but yes you are going to risk hermaphing.
greg1317 Reviewed by greg1317 on . changing light cycles? I have two plants going under two lights.They are on alternating schedules.....12am to 12pm and 12pm to 12am..... What I want to know is if I put the 12 am to 12 pm room on 24 hours darkness then put that plant into the 12 pm to 12 am room(really just combine the two 150 rooms into one 400 room) would I have to worry about hermies etc...... She is about 20 days into flower right now(the one I would move). Thanks C Rating: 5