yea. for veg state you want 18 hours of light and for flowering you want 12 hours of light. when they are flowering if more than 12 hours of light is received it ruins the cycle and starts them on the veg state again, also stressing the plants outbecause veg has a longer light cycle than flower. 18 hours of daylight as opposed to 12 hours of daylight for flower. seperate rooms are the only possibility.