hello torog mate,
great info mate, i think i read it somewhere myself, i think if if you have the time decreasing the hours of light you give it before indusing flowering by half hour at a time will be far more natrual for the plant, and much less of a shock, it can only be better, i think its allways best to keep things as close to natrual as possible., take care mate and be luckey
........... peace happy ...........