This one is truly a beauty. Here is the new RGBW high-power LED from Cree.
XLAMP XM-L COLOR LED RGBW (XMLCTW-A0-0000-00C3ABB02CT-ND)
I got the mount from a company in France who makes MCPCBs, or metal-core printed circuit boards, and thanks to PayPal I was able to quickly get test out my new RGBW LEDs. The picture above was taken with each LED using a 5V PWM driver set to match the camera saturation for each device. Each one of these LED chips have wire-bonded contacts and are embedded into a single dielectric hemisphere.
Now I can make all of the colors!