you will see the difference with that lighting - at present with a 9 week plant used 11/13 now going to 10/14 to speed up harvest timeTotally agree, I forgot to mention I use 660nm red at lights out to " try " and circumvent this. the 660nm puts the girls to sleep rapid instead of the 1-2 hours it would with a conventional switch from lights on to lights off, allows you to run a 13 on / 11 off, but only 1 of my tents has this at the momment ( 36 x CLU048 3k and 3.5k with 18 x epiled 660nm 3w diodes ) which is the fucker that chucked hairs at 7 days. I need to make some more pucks for my other tent, but theyve already started chucking after being on 12/12 for 12 days, as ive not ran this cross yet it. Im going to take an hour OFF the timer now to give them 11/13.