This my be a dumb question but I'm new at this and a little buzzed at the moment. I know what they mean by setting the lights 12/12 so to tell the sex. What do they mean when they say set the lights 18/24?. If I was reading it right.
I have run my light both ways and there is hardly any noticable differance in plant growth. But you will notice a difference in your electric bill if you go from 24/24 to 18/24.
i have noticed a difference as my grow area is very small but i also keep my lights 24/24 as i am in england and growing in a cold garage so keeping these lights on 24/24 also helps with the temperature in my grow room. It should see them through the cold spells and into spring which will be milder when i start to flower.
We're in 2 different coutries. Even if spring starts at the same time, i would imagine your temperatures are gonna be slightly warmer than here aren't they?
Spring here is like March onwards...
... until it changes to summer of course
are you thinking i'm growing outside or something?
p.s. fact is... in my garage, my temperature was dropping too low to keep my plants alive, i switched to 24/24 and insulated my room and now they live! No contest, it's 24/24 all the way for me buddy.