Best Light Duration - 12/12 - 6/18 - 0/24 ???

I often read that you can leave your lights on in the Veg stage for 24 Hours and More.
If this is true, then is it wise to do so and why, and If Not then can I get opinions why?
Also what others time frames you have found to work well?
I know most would agree that 6/18 is the norm.
Thanks

rak1 said:

I often read that you can leave your lights on in the Veg stage for 24 Hours and More.
If this is true, then is it wise to do so and why, and If Not then can I get opinions why?
Also what others time frames you have found to work well?
I know most would agree that 6/18 is the norm.
Thanks

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The plant is likely to grow fastest with 24/0 but this isn't exactly ideal. Supposedly studies and tests and etc. have shown 18/6 to be the optimal balance between light and dark for cannabis, and that while they will make use of light after 18 hours they will do so with less efficiency. So unless you need the heat generated by the lights to keep your room warm during the winter, and your electricity comes cheap, I wouldn't ever go 24/0

Its supposedly more stressful for the plants to go from 24/0 to 12/12 than 18/6 to 12/12. 18/6 is definitely prefered over 24/0 for auto flowering MJ plants

Yep, straight from the MJ Growing bible: 18/6 for vegging & 12/12 for flowering. I do however keep freshly cut clones under a low power CFL/florescent for 24/0 until they grow a good root system, which usually takes 2 to 3-weeks.

Peace out

jdizzle22 said:

The plant is likely to grow fastest with 24/0 but this isn't exactly ideal. Supposedly studies and tests and etc. have shown 18/6 to be the optimal balance between light and dark for cannabis, and that while they will make use of light after 18 hours they will do so with less efficiency. So unless you need the heat generated by the lights to keep your room warm during the winter, and your electricity comes cheap, I wouldn't ever go 24/0

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Lately ive been doing 22/2, more dark means more streching in the long run.

What do you guys think about 20/4 ?

All in all I don't think a few hours either way is going to make or break your grow. I keep my clones under 24/0 with some good CFL over it also, and then run 18/6, 12/12, and then the last few days before harvest I cut down to 10/14. 8/16, dark a day, and then harvest.