how vital is darkness during veg

i have been running them 24hrs for 3weeks just needto know if i should start a short dark cycle

18/6 or4 but darkness is always needed in growth thats were the main growth comes from in any plant is at night

I have read a few places that cannabis is a C3 plant. And doesn't need a dark period to take in co2. 24hr veg is fine.

HighLife4Me said:

I have read a few places that cannabis is a C3 plant. And doesn't need a dark period to take in co2. 24hr veg is fine.

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i've read the same exact things many times, even read jorge cervante's saying how plants grown under 24 hours of light will grow 33% faster than plants that are only given 18 hours of light, but from experience, i've found that plants grow a lil better when they do have some dark period...
i like 18/ 6 myself...

i followed uncle bens advice here on this issue and went 20/4. I like it a lot myself