Xtreme LED Replacement BulbThis is an LED replacement bulb. This Xtreme LED bulb is made by SoCalMotoGear and is designed to replace the 1156 and 1157 style bulbs used in many cars and motorcycles. This is available in either amber single brightness 1156 style base, amber dual brightness 1157 style base or the red dual brightness 1157 style base. So, the red 1157 bulbs will function as running and brake lights, the amber 1157 bulbs will function as running and turn signal