homegrownlights' DIY Cree Xlamp LED Grow Light kit page changed recently to include a fuzzy photo and some text (non-fuzzy).
DIY Cree Xlamp LED Grow Light - HomeGrownLights.com

The kit contains four Xlamps: three XR red (620-635nm) and one royal blue XR-E (450-465nm), and will be available in April 2008 for about $60. I got the LED wavelengths from the Cree site at:
CREE | XLamp XR-E LEDs, leading the revolution in lighting

The Xlamps used seem to be identical to those found in the Procyon 100: containing 56 Xlamps (40 red and 16 blue), making the Prycyon only SLIGHTLY more heavy on the blue (two less red and two more blue) than fourteen DIY 10 watt kits (which have 1/14 the number of Xlamps per kit).