Nice! I've never seen those LM lights around here. Don't see many of those Powr/Doors up there either. I wonder if it was MV or factory HPS? (or like you want to know, still MV?) Factory HPS M-250As are pretty cool since they're still from the early days of HPS. Of course they look better in Mv though.

Factory HPS might be a possibility too, if the M-250A was made in the late 70s there's a chance that it might have been factory HPS. Uxbridge has some pretty interesting lighting, unfortunately most of the M-250As got LED'd in 2016 but these are still in use.

Speaking of early HPS, one of those HPS M-400As installed on Bloor Street in 1967 would be pretty interesting. Unfortunately I think all of them got replaced when they replaced all the poles in 2006.

There's four of those Styleaires in the parking lot of McKinley Vocational High School, three of them with the original deep glass refractor, the other is missing the lens.

Here's an old sell sheet for these:

Now that I think about it, and I'll go soon to get pics of them. They may be Stylevues at McKinley HS

Neat ad, I was trying to find it before I posted this pic to find out more about these lights.

Interesting that MH was known as metallic additive back then.

i've never seen one of those in person ever.