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i have a crouse-hinds 1950s spot light that uses a 500matt HS 40 bulb Answered

so every bulb i look at the threaded par is too small and a bulb with the right size threads are big street light looking things ,i think that need a balance so i tried a screw in thread reducer but it didnt seat all the way down .do i need a bakace for  the big bulbs?   

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Jack A Lopez
Jack A Lopez

4 years ago

I think that shape is called "Edison socket". Wikipedia calls it, "Edison Screw", and the article with that name,

https://en.wikipedia.org/wiki/Edison_screw#Fitting...

has some pictures and stuff. The most common Edison socket is E26, which has a large diameter of 26 mm. Although from the table linked above, there are larger sizes out there, most notably this E39 or E40, called "Goliath"

I am not sure what you mean by "balance" or "bakace". My best guess for a match to this word, is "ballast",

https://en.wikipedia.org/wiki/Electrical_ballast

I am guessing that filament-type, incandescent, light bulbs do not need ballast, whatever the size.

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iceng
iceng

4 years ago

The Russians are into manufacturing old style tubes.

Give them a try on your bulb.

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Downunder35m
Downunder35m

4 years ago

If you can't find suitable bulbs anymore replace the fitting with something that is standard in todays times ;)