AJtheTeacher
In Texas

Paul, according to Google:I can't shed any light on the problem, but that looks a really useful sized light fitting. You'll have to excuse my ignorance though, how big is it? An American coin means nothing, sizewise, to me.
Yes sir, I did. Thanks for asking. AJ the Teacher.I swear I see letters/numbers in the metal end caps, just like on fuses... did you pull it out from the clips and get a magnifier on the ends?
No sir. Would you believe that it was at the top of an Aristo-Craft vista dome that I purchased last week? And it shines just the perfect amount of light to give just the perfect nighttime glow (my opinion) as it runs on my layout. It was wired into the stock Aristo-Craft vista dome wiring so well that I was wondering if it was stock.......Hmm... just a trick in the photo.... do you know the voltage and amps?
Greg
Hi Paul. I am a car guy and I have spent more time in auto scrapyards than I have talking to..... my best friend. I think that is a GREAT suggestion, but I have never seen one like that in any car or truck; foreign or domestic. But I wonder if it might be an ashtray or glovebox light too. But it works SO well without anything to drop the voltage.It's not from a car glove compartment or something else in the automotive world?
All Electronics lists “fuse lamps” at 6, 8, and 12 volt ratings. They are not opaque, but look identical and work with the glass fuse (AGC) mounting clips. They contain a long filament that does disperse light nicely. Interestingly the light mounting holes on LGB coach roofs provide perfect alignment for attaching individual fuse sockets to be bridged by the bulbs. They were a good low profile light source 40 years ago, before the awesome options of led’s. Now they are a rare commodity. The only other place I saw them used was as a dial light source in a 70’s stereo.It's not from a car glove compartment or something else in the automotive world?