TWIN STEPPED PIN.. DUAL CONTACT on base
RED LED
Helps to colour up old or faded lenses too.
If your wanting to brighten up the Brake lamp illumination.. safely and simply..use LED RED bulbs.... per RHS lower image.
This is a PAIR.. set.. Note the pins are stepped.. one UP . one DOWN.. this is for the US turn signal on the REAR and Brake lamp socket.
- Twin contact on the bottom.
- Pins are high and low offset from each other.
This is so much brighter then normal filament bulbs.. and if illumination is a safety factor in all conditions..its a wonder they are not manditory..
Check the others listed also for more LED bulbs.. they make sense.
Other types of bulb bases are shown below to help you identify yours... these are 1157's x 2