I was wondering why they didn’t stretch. I prefer 18/6 also. I think when I was plugging in other things on my strip I bumped the switch. Now it’s been at least two weeks and now there in early flower. I switched it back and now I guess I’ll see what happens.I prefer 18/6 myself
Yet some say 20-4... It’s strain all dependant.Autos do not. Even one of the top auto breeders in the world grow with lights on 24/7 , Mephisto. I have tried both ways and have always had netter&quicker growth with 24 /0 . More DLI the better.