There are several levels of PoE:
- PoE (IEEE 802.3af) provides up to 13 W (37 to 57 V, max 350 mA).
- PoE+ (802.3at) bumps it up to 25 W (42 to 57 V, max 600 mA), but requires Cat5 cabling or better. (If each LED draws 3.3vdc then PoE+ port can support up to 7 of those LEDs. The volts drawn by each LED seems to be the limiting factor, not the amps.)
- UPoE: 60vdc limit but at how many amps?