Daylight to fulfill Lighting Needs for Demented Elderly

recommendations are found for illuminance levels (E) and color temperature (CCT). Visual and NIF effects can be achieved by electric lighting as well as by daylight. The aim of this study was to locate the position in the communal living room of a newly build Dutch nursing home, which fulfill both needs most of the time, using only daylight. The time slots for the NIF effects were taken from 10-11 am and from 34 pm and for visual needs between 9 am and 5pm.