dagsljussynchronisering

Dagsljussynkronisering is a concept in lighting engineering and urban planning that describes the real-time coordination of indoor artificial lighting with outdoor daylight cycles to optimise energy use, visual comfort, and circadian health.

Derived from dagljus (daylight) and synkronisering (synchronization) in Swedish, the term commonly encompasses daylight harvesting, adaptive dimming, and circadian lighting strategies implemented through building automation systems and smart sensors.

Photometric sensors monitor ambient illumination and occupancy, while weather data and time-of-day models predict daylight availability. Control algorithms adjust electrical luminance and correlated color temperature to maintain target illuminance and circadian-friendly spectra. Some systems progressively shift color temperature from cooler, blue-rich light in the morning to warmer hues in the evening, aligning with the natural day-night cycle.

Applications include office towers, schools, hospitals, retail, and street lighting networks; these systems are often integrated with building information modeling (BIM) and the Internet of Things (IoT) for energy management and broader urban efficiency.

Benefits include energy savings, improved task performance, and better alignment with biological rhythms. Challenges include sensor calibration and maintenance requirements, upfront costs, and ensuring interoperability across devices and standards.

See also: daylight harvesting, circadian lighting, intelligent lighting, adaptive lighting.