I don't know for sure in the case of the 6450-C12-PD, but from a technical standpoint, yes it's possible. I've got a little Netgear GS105PE running on PoE power from my 6450-24P, and it's feeding power to a UAP-AC-Lite without issue. It's obviously very limited in the amount of PoE it can pass out, but there are units that do it.ICX6450-C12-PD POE question:
If the switch is powered by POE+, can it also provide POE power to a device or two? It’s not clear from any of the documentation I could find.