Ambulance Tunnel lights

They do not appear to be Henney tunnels, at least '51-'54. Henney tunnels have a raised ridge along the top. Also, they appear to have a different angle - on the Henney tunnels, the top of the lighttunnel would be horizontal, and would form a 90 degree angle with the light bulb (vertical). On this one, the top of the tunnel would angle downward from horizontal, the angle between the light and the top is an acute angle.

Not "cute" as in adorable. :p "Acute" as in sharper than 90 degrees. See, I remember some of my high-school geometry. I'm pretty sharp. But not cute.
 
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