question about light cycle

[mattman6618]

I am growing ppp in a closet grow under a 400 w hps.I am currently under a 18/6 light cycle.I was wondering if i switched it to 20/4,or even 22/2 would i this harm the plant.I read in a few places that it would grow quicker under more light.I thought the lights out was important in the veg stage,But wanted to know for sure before i try anything crazy

 

[jerryclub1]

you can run the lights for 24/7 but i think what you read was "more light" means, more watts, lumens......

 

[mattman6618]

you can run the lights for 24/7 but i think what you read was "more light" means, more watts, lumens......

so switching from 18/6 to 24/0 causes no damage to the growth of the plant

 

[SunKissedBuds]

i have experimented with 24/7 schedule, 20/4 schedule as well as the 18/6 schedule and i have found that 20/4 works well for the first week of veg then i switch to 18/6 for the remainder of the veg cycle.. keeping it at 18/6 towards the end of the veg stage will ensure you dont shock the plants when forcing them into the 12/12 flowering schedule. 22/2 might be too much when putting them into flower

 

[mattman6618]

i have experimented with 24/7 schedule, 20/4 schedule as well as the 18/6 schedule and i have found that 20/4 works well for the first week of veg then i switch to 18/6 for the remainder of the veg cycle.. keeping it at 18/6 towards the end of the veg stage will ensure you dont shock the plants when forcing them into the 12/12 flowering schedule. 22/2 might be too much when putting them into flower

GOt it.Yea im thinking im just going to stay with the 18/6.I dont want to have to bother slowly bringing it back as i get closer to flower.This is my second indoor grow,and i still havent got passed the veg stage,but im not a quiter

 

[Nocturn3]

A well known grower, oldtimer1, researched vegging times, and concluded that 20/4 gave the best end yield.

Originally Posted by oldtimer1

We did a lot of experiments with light times a few years back using known sat and sat dom clone lines.

With Vegging ie under hid lights.

20/4 produced the most sturdy growth and the most bulk. Best final yield, taken as 100%.
22/2 Less of both. yield 88%
18/6 Studier than 22/2 but slightly less bulk. yield 87%
24/0 Much lighter in all aspects than 18/6. Yield 79%
16/8 The weediest plants. yield 67%

Plants vegged to final pots under fluorescents at 20w per sq ft on 18/6 yield 49%

Have not tried 36 hrs dark but did try 48 hrs from 18/6 veg. The final yield was down between 15 and 20% by var the pure sats the biggest loss in final weight and caused the odd herm, [sats] it did reduce the flowering time by 5 to 8 days.

For the mum lines we have 20/4 to 12/12 gives the best crop weight and bud quality, really thats all I’m interested in.

Taken from here.

 

[M Blaze]

18/6 is the usual period but 20/4 works well too and personally thats as high as I would go.

 

[smokinsilly]

haven't made it past the veg cycle? Interesting, what happened? Nutes mess up, light?