This is the Cooper Lighting Caretaker LED Roadway Luminaire. They are compatible with open bottom refractors. My guess is the lineman who installed this put the open bottom refractor from the old NEMA head on this luminaire.

More likely they ordered a new bucket with it. That bucket looks brand-spanking new.

It looked kind of new. I wasn't sure cause I'm on my phone, not a computer.

I actually kind of like the way this LED nema looks. I wouldn't mind seeing these more often.

Kind of looks like a Nema and an "LB" conduit fitting had a good time to create this

I bet the wasps will love these. The LEDs don't put out enough heat to keep them out. Those buckets provide a nice enclosure from the wind and rain. Any NEMA I've seen that doesn't work is FILLED with wasp nests.