I work/consult for a startup doing Power Over Ethernet Lighting (www.igor-tech.com). We use UPnP (universal plug-n-play) to communicate with lights as there is

I work/consult for a startup doing Power Over Ethernet Lighting (www.igor-tech.com). We use UPnP (universal plug-n-play) to communicate with lights as there is already an open spec. FWIW, we're also releasing an open reference design for hardware.