I wouldn't do it.

One of the things I've noticed in reading A LOT of cannabis grow books is that they mainly all say to put the lights on a timer. I assume that means it would behoove one to get the plants on a strict light schedule and keep it that way, no wishy-washy'ness.

I've never heard other wise but I think swapping the lights back and forth is gonna throw off some sort of balance.

Even some expert growers will change their lights from 18/6 to 12/12 by changing the time only one half hour less daily. So basically they go 18/6, 17.5/6.5, 17/7, and so on until they reach 12/12 in the hopes of it being an easier transition for the plant. This too would lead one to believe that keeping the light sched strict is best too.

Or, do what I did. For the first few weeks I had my plants on 20/4. That cut down on the light bill just a bit but keeping you at 20 hours of growing goodness a day
Slevinkal Reviewed by Slevinkal on . 18/6 and 24 hour on and off? Hey guys, im just curious if it would screw anything up or damage or whatever to my plant if i were to do 18/6 one day and then the next 2 days the 24 hour method and then after that back to 18/6 .....etc. and the reason i ask this is cause i want to do 24/7 but it would still be to much electricity for me to use even tho im using cool white t12 florescents, and want to get the most i can so i figured one day 18/6 and the 2 days 24.....thanx for reading and please get back to me soon fellow Rating: 5