Patent ID: 9655191
Date: 2017-05-16
CPC Classifications: F21S,F21V,H05B,Y02B

Claim:
1. A lighting device comprising: at least one first light source adapted to issue a first beam during operation of the first light source, at least one second light source adapted to issue a second beam during operation of the second light source, and in dependence on dim levels of the respective light sources, said first and said second light source together are adapted to issue light with a variable total light flux and variable illumination levels, and at a mutually equal light flux of the first beam and the second beam, the first beam and the second beam have a respective glare level, the glare level of the second beam being lower than the glare level of the first beam, and at least one programmed controller which, during operation, is configured to moderate said dim levels in a range of illumination levels, wherein the range of illumination levels comprises a first illumination level range and a second, higher, illumination level range, and in that in the second, higher, illumination level range a ratio of the dim levels is configured to increase with increasing total light flux, and wherein the at least one programmed controller is configured to moderate the dim levels such that in the first illumination level range the increase of the light flux of the first beam is higher than the increase of the second beam.