http://www2.cree.com/smartcast-landing-page
Would you build it? Seems to make sense, considering the low cost of midspan PoE injectors these days. Or even old 802.3af 100Mbps switches you can get used (Cisco 3560, 3750). One of the neat things about doing PoE lighting is that you could control all the lights in a building via a shell script and SSH session into a PoE switch, turning on and off ports based on cron jobs, schedules, as a result of a script server receiving some event, etc. This could be done with a $50 box running Linux. No need to run any vendor proprietary software of any sort. One of the things I realized when thinking about this is that it could dramatically lower labor costs to install lighting in a large building. You'd be looking at the hourly labor rate for low-cost "low voltage" alarm cabling/cat5e pulling install technicians and not licensed electricians (apprentice or journeyman). Electricians would of course need to do the rest of a building's 120/240VAC, but not the lighting.
