DIMMABLE LUMINARY FEATURING COLOUR CHANGE DURING DIMMING

摘要

A wake-up lamp system (100; 1000) comprises: a light source (130) having a nominal light output intensity (Lmax); and a control device (110) for controlling the light source, the control device receiving a clock signal from a clock device (120). The control device, when operating in a wake-up mode, controls the light source such that its light output intensity is gradually increased from a minimum intensity value (Lmin) to a maximum intensity value (Lmu) and such that the colour point of the light output is gradually changed to travel a predefined chromaticity path, with the position of the colour point on said chromaticity path being set as a function of the light output intensity. Said chromaticity path has a starting point having a colour temperature between 400K and 1500K associated with the minimum intensity and an end point having a colour temperature higher than 2700K associated with the nominal intensity.