I've seen lots of talk about using arduino/pi/etc and a zigbee board to talk to existing ZigBee Light Link compatible lights such as the latest Phillips Hue bulbs. But I want to go the other way... I want to make the light but be able to use that with any existing ZigBee Light Link supported hub device (Samsung SmartThings, Wink, etc). But sadly, aside from the official ZLL spec doc, can't really find anything. Maybe this just isn't done outside of large corporations? I'd really love to be able to just use, for example, and arduino compatible chip, ZigBee radio, and then appear to a home automation hub as a ZLL compatible light.