Manufactured by General Electric between roughly 1937 and 1950, this is the Novalux sectionalized signal. The lenses are commonly referred to as "spiderweb" style and if you look closely you can see the GE logo embedded in the center of the lens. The pic below is one from my collection.

Interesting that they painted these in the field after installation instead of beforehand.

Yeah LEDs don't get hot enough to melt snow, but with the amount of money saved in electricity and re-lamping (LED signals use about 1/10 the electricity of incandescents, and last about 10 times longer) they can afford a crew to go out and blow off the signals with compressed air or brush them off with a pole the very few times a year when it might matter.

[U.S. Patent 7211771 B1, "De-Icing System for Traffic Signals." -Dave]

You all may have noticed the proliferation of LED traffic signals in your area. I can tell you that in Erie, PA, the new ones don't get hot enough to melt the snow that blows into them. Same with LED marker signals and headlights on cars. Newer ain't necessarily better.