Lighting device with natural and artificial light

摘要

The illumination device comprises a light guide plate (4) for directing the external natural light into the building space, a light generating element (6) for generating an artificial light, and a light emission surface area (8). Both the natural light and the artificial light are placed at least partially on the light emitting surface area. A control element (10) is arranged for controlling the light generating element, such that the intensity and/or the spectral property such as the color temperature of artificial light can be changed.