While doing some google street view scouting i noticed these small clamshells in a parking lot. They appear to have some kind of latch at the top and don’t look like anything I’ve seen before. Does anyone know what kind of clamshell it is?

I wonder if it's some form of P/C ?

Could also be one of the more obscure Canadian luminaire manufacturers.

That thing on top looks like one of those PC sockets for remote use with a 1/2" nipple on the bottom, mounted on the angled part of the housing.