- 53 Visual lighting design
- 54 Circadian lighting design
- 55 Electric light glare control
- 56 Solar glare control
- 57 Low-glare workstation design
- 58 Color quality
- 59 Surface design
- 60 Automated shading and dimming controls
- 61 Right to light
- 62 Daylight modeling
- 63 Daylighting fenestration
- P2 Light at night
- P3 Circadian emulation
To provide light which has intensity and spectrum similar to that of the daily changes of sunlight.
Many animals evolved to adapt to the diurnal cycle by using light as a cue for activity and rest. Subtle changes in light quality over the day help modulate the intensity of activity, levels of alertness and preparation for sleep. The power of home lighting can be strengthened by automating the selection of light type according to the time of day and by managing the spectral power distribution of light over the day to more closely resemble the solar cycle. This feature uses the equivalent melanopic lux unit defined in feature 54.