Here it is. Rick and I went on this walkbridge that has two of these lighting the street intersection below. Note the wiring has only one black and the bare wire is neutral. That means this light is 120v.
I've noticed here that older RIDOT/NGrid M-250R2 have blue PCs and when they're serviced they get new blue PCs. But if an older R2 dies, the new one has a 120V PC. I wonder if the poles are actually 240V and NGrid just caps the second hot? Or would that not work for some reason? It's odd to me becuase existing lights will still get a M-Volt PC but all the new ones that NGrid installs as replacements have 120V PCs.