By 1926 General Electric was promoting inside frosted lamps, even for use in ceiling fixtures. Period literature from GE promoted the new inside frosted lamps and compared them against the "old" round bulbs (G25, G30, etc.) saying that the shape of the new inside frosted lamps was "the one selected by artists, decorators, designers, and architects." These lamps are virtually unchanged in general shape from those still sold today, though the color of the inside "frosting" is probably a bit different. Of course, the older round bulbs would provide an old fashioned look, and given the year of your house, they are still not totally out of line. It might be a better idea to study some books relating to lighting design, fixtures, etc. from this time period to see if there's a more appropriate bulb suited for the style of your particular fixture. As for the flame bulbs - I'm not really sure. They were produced in a white painted finish and a brown painted finish during the 1930s, but I'm not sure about the 1920s and I'm not sure what you mean by "bent tip or torpedo shape" (I'm thinking about the standard Mazda flame shaped bulbs.)
