the plant needs a longer dark period to flower it has nothing to do with the light period other light periods have been used such as 6/6 just to keep a plant in veg mode and reduce its growth and to cut down on electriciy usage.

most all strains except the autoflowering strains need 10 -11 hours of dark period to induce flowering increasing the dark period more will speed up flowering wich is why 12/12 is used
bejay Reviewed by bejay on . Shorter 12/6 flower cycle Okay, anyone have EXPERIENCE with the shorter 12/6 flower day? Noone seems to know about it. Rating: 5