The light cycle determines cannabis growth phases by regulating photoperiod responses. During vegetative growth, plants thrive under long light periods (18–24 hours of light daily), while flowering is induced by a 12 hours light / 12 hours dark schedule. Autoflowering varieties differ, flowering based on age rather than light cycle. Precise control of light exposure is critical for healthy development, bud production, and preventing stress-induced hermaphroditism.
