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...http://www.google.com/patents/US7497587?utm_source=gb-gplus-sharePatent US7497587 - Lamp
