All the main roads around my area are either 250 and 400 watt mercury vapor and occasionally 175 watt mercury vapor but the bigger ones are 400 watt and the smaller ones are 250 watt max.
Most of the fixtures we have as smaller ones are 175 watt but sometimes we have bigger fixtures with 175 watt...I know a GE M-400A1 that has 175 watt...it's near me...
Cool! Did any of them have the original plastic refractor? I heard the M-400s lower than 400W were supplied with a plastic refractor and called the M-250. Then the smaller M-250R rolled out in the early 60s?
Yes I did take the pic, I was with an off duty lineman in his own personal truck (not the bucket truck, against the rules), and he was showing me the lights in the area! And I took that pic when he told me about those fixtures that were 175 watt with en-longed sockets inside to center the lamps in the reflector and that it had red/orange gaskets
oh sweet! There are 3 250W HPS M-400 "split door" lights at my school. Two have slightly yellowed plastic lenses while the other has no lens and a few bullet holes. They light an access road and while the fixtures and lamps themselves may work, I don't think they're switched on anymore.
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is that a M-400?
It is actually a 175 watt! It has a LONG socket inside to keep the lamp centered, oh it also has a orange/red reflector gasket!
It is one of the earliest fixtures....see it does NOT have a extra tab on the latch to make easier to open....
I will ask if any had the plastic ones OK...
so you didn't take this pic?