This company makes a great range of high performance LED fixtures.
British Science Museum
Sky Israel
Glass Lighting
D-Wash 36 36 High Power Luxeon Leds RGB
IP40 and IP65
D-Wash 18 RGB D-Wash 18 Cool White
D-Wash 18 Warm White
D-Wash 36 Cool White D-Wash 36 Warm White
D-Line RGB, Cool White, Warm White 1W LEDs
D-Line RGB, Cool White, Warm White 3W LEDs
Mega Ace 48 Mini Ace 48