I grew up in El Paso TX in the late 40s and 50s and I don’t remember any wall mounted porch lights, most had the old white ceramic socket in the center of the porch ceiling with a 100 watt bulb and rarely with a cover. Maybe just West Texas.
Mel
Modeling the early to mid 1950s SP in HO scale since 1951
Those type designs here in the Midwest aren’t really considered porch lights. I have one on the side of My front door. With concrete landing and steps, with cast iron railings on both sides. Steps lead to a walkway that goes to My driveway. My house is a cape cod, built in 1954.
As far as the fixture, I don’t recall seeing anything available like that, for models, but if You can scratch build one, I would highly recommend picking up some Pico light chips instead of the light bar, They are extremely tiny and will fit about anywhere and produce a 360 degree light just like a incandesant does.
In the two pic’s, the light sitting to the left of the truck is a Nano chip. The Pico chip is less than half that size:
I put a red light next to the door of Val’s Place, across the tracks from Farley, Colorado, on my old Colorado Western. Drilled a hole in the building front and inserted a red GOW (that’s Grain-Of-Wheat to you youngsters under 60). Does that count? HeHeHe!