IMO- You should use 18/6. The plant has photoreceptors that tell the plant when it's light or dark. It pretty much has a biological clock. It knows it's age. from the light/dark cycles.I did have it 24/7 before i switched. My eyes seem to catch glimpses of pistols but when i double check its not always the same or i see something different.
I will wait.
Yep, I've experienced this with some of my Kush's also.my critical kush put out pistols on 24 hours of light at around 6 weeks so it can show sex before light change.