Nice thoughts. It's something I find interesting. I'm not sure about in the US, but in the UK all lights before around the 1920's used bulbs with long filaments. The reflectors were designed around them - also some used a half milk-glass envelope to further boost output. Also some lights had flat envelope bulbs which sat the filament further down in the reflector.
Using post 1920 bulbs in such lights will work fine, but the beam may be odd - often with a tiny hotspot and rings in the beam. Original bulbs give a broad and smooth hotspot. The trouble is most originally fitted bulbs have been long swapped out but occasionally you can strike lucky.
Those Westinghouse bulbs - what is the filament? Curly or a straight wire? They look like what would be fitted to a larger work light or lamp. One with a bigger reflector.
This picture is of some of the 1910-1925 original bulbs fitted to battery torches.