well, you only need to put 1 AC outlet wherever the 48-port PoE switch is, vs running 120VAC everywhere around a ceiling. So that's a 48:1 ratio at least.
On Wed, Apr 27, 2016 at 6:35 PM, Lewis Bergman <lewis.berg...@gmail.com> wrote: > Since you still need AC outlets I can't imagine the savings would be all > that significant. The industry seems to be headed to figuring out how to > get the enormous installed base to LED. Since electricians are the Obrien > pulling the CAT5 now I can't see how you get the cost down. > > On Wed, Apr 27, 2016, 7:53 PM Eric Kuhnke <eric.kuh...@gmail.com> wrote: > >> 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. >> >> >> >> >>
