Abstract: A lighting control system has at least one light fixture for illuminating buildings or partial surfaces thereof or goods or objects. Each light fixture has a plurality of light sources that generate light of different colors, and each fixture produces a total light output as a sum or mixture of the light emissions of these light sources. The control system itself has at least one control for adjusting the light emitted by the light source, a color selector that sets the color of the total light output, and a balancer that retains a set color of the total light output when a light output of at least one of the light sources is changed.

Abstract: A light fixture for fixing to a building or building surface has a trough-shaped reflector having first and second side walls forming a light outlet and a reflective inner surface, each of the side walls having a planar section. A diffuser is mounted on the outlet. A plurality of LED's of different colors on the planar sections are positioned such that a predominant portion of the light emitted by the LED's on one of the side walls only reaches the diffuser element after reflection off the other side wall.