SODIAL(R) Car 1157 P21/5W 1016 White 3528 SMD 120 LED Turn Signal Back Up Light Bulb Lamp SMD LED also known as surface mounted display LED chips, more common than you think. Despite its futuristic look it's found in all residential, industrial, and in this case automotive uses primarily because of its low power consumption and its long lifespan. LED chips soldered on circuit boards for