Is it bike or car?

[Hukah]

Hello.
Being an old bike enthusiast, I recently bought this "light housing" listed as for a 40's/50's bicycle.
It is en route as of yet so I do not have physical possession to fit it up.
My bike group "gurus" insist that it isn't for a bicycle; the arc is too small for a bicycle fender.
I have to admit that it does present a small arc in the photos.
So what do ya'll think?
Is it bike or car?
Who's right?

I also have a 1978 Triumph Spitfire.
It's not a big collectable but it's a lot of fun to drive 

[Guest]

Seems a little long but maybe a vintage truck clearance light or maybe taxi side roof light?

[Mark Wetherbee]

Truck clearance light is my opinion too...

[Douglas Gilmore Brown]

I think it was mounted on the top of the headlight pod of a late 1940's Chevrolet truck, to hold the turn signal.

I had a pair of these about 15 years ago.

[TerryB]

Look at the top of a headlight on a 1946 Chevy pickup truck, sure looks a lot like your item.

[Hukah]

5 hours ago, TerryB said:

Look at the top of a headlight on a 1946 Chevy pickup truck, sure looks a lot like your item.

That's it terry.
You nailed it friend.
Thank you.