This can be use for the turn signals，or backup/reverse lightsLong-lasting Life - 50000 working hours Easy installation， just plug & play Faster response time and vibration resistant If the LED does not light up， simply flip it 180 degrees (reverse the polarity) Lumen:450LM/pcs;Color Temp:6000K~6500kSize: 5cm (2")BULB SIZE / CROSS REFERENCE:3157， 3456， 4156，3157A， 3157NA， 3057， 3155， 3357， 3457， 3757， 4057， 4114， 4157APPLICATION:Perfect for Daytime Running Lights. Since the nature of the item being offered might fit a large variety of different vehicle and function. Please make sure this is the correct application type of bulb before placing order. ATTENTION: For vehicles that has the daytime running lights that also function as turn signal lights， please add the load resistors. These resistors are necessary to both compartment to function properly.Package include:2 X 3157 54 LEDs Bulbs