difference between 24/7 18/6 light period (pics)

Skateforlife6 said:

Its 18 hours of light and 6 hours of dark. 24/7 isnt possible.

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420OldSchoolDJ420 said:

yes it is.. 24 hours a day 7 days a week = 24/7 lol.



To the OP,
If your asking which is "better" , I have heard that 24/0 gives faster above the ground growth and 18/6 and 20/4 give more root growth.

Hope this helps

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Skateforlife6 said:

Its 18 hours of light and 6 hours of dark. 24/7 isnt possible.

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Closet Grow (BuD) said:

lol... your wronge

but 24/7 makes leafy growth
18/6 promotes root and leaf growth...

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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.

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Skateforlife6 said:

Its 18 hours of light and 6 hours of dark. 24/7 isnt possible.

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Nocturn3 said:

I believe that 20/4 is the optimum veg timing schedule, with regards to end yield. Here is post written by OT1 on the subject:


Taken from here.

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