Hello everyone first time posting here.  Great site,  I have a GE street lamp that I've been trying to find more info on.  It has a bucket style refractor with a closed bottom and in center of the bottom it has a aprox 1" diameter screen.  Also the refractor is held to the fixture with a aluminum band clamp that goes completely around fixture and refractor.  It looks very similar to a NEMA.  On the the side of the refractor it says general electric model 545 and the fixture uses a mercury vapor bulb.  Thanks in advance, Steve

Welcome to L-G ! Can you post a picture ? It would make the identification easier.

Here is the best pic I have at the moment might be a few weeks till I can take another one

Huh, I’ve never heard of a form 545.