I've used this for years. One of my favorite tools is a stop/ tail socket and 1157. You can wire it up several ways depending on what you are doing with it.
Both pigtails together and the socket shell is highest wattage
Or use stop alone, some less W
Or use only the tail filament, even less W
Or let the socket "float" and use each pigtail for the two terminals, that puts the filaments in series for lower wattage
