Common as dirt over here. 250 or 200 watts hps. I can't read the NEMA tag while I'm writing this so I'll look later. UTD campus area. Theres a street that has some of these.
Nice! This is a 90s Thomas & Betts version (possibly late 80s). They used these here in 250W and a few 400W HPS. Looks like this wasn't the original light on this arm...