Specification: Color: Pure white 6000K; Working Voltage: 12V-24V; Output Wattage: Bright Mode 3.5W/Dim Mode 1.2W; Size: 1.36 inch long and 0.75 inch in diameter; LED Chips: 54SMD 2835-SMD; Double Contact Bayonet Base: One of the two parallel lugs is higher than the other base. Cross Reference: 1157 BAY15D bulbs have both contacts wired to '+' and the lug body wired to -. It can replace bulb model 1157 BAY15D 1016 1034 1157 1157A 1178A 1196 2057 2057A 2357 2357A 2357NA 2397 3496 7528 etc. Plug and Play: Easy to install, just plug and play. Polarity sensitive: If the bulb does not illuminate, remove the bulb, rotate it 180 degrees, and then re-install into the socket again. Test to ensure proper function. Application: This white BAY15D (1157) LED replacement bulbs can fit vehicle Backup Lights, Reverse Lights, DRL / Day Time Running Lights, Tail Lights, Trailer Lights, Brake Lights, Parking Lights, Sidemarker Lights, Turn Signal Lights, etc on car, vehicle, tractor, RV, motorcycle, motor home. Note: When LED bulbs are used as turn signal lights, you might need load resistors or flash relays to prevent hyper flash or error code on the dashboard. Please double check your bulb's type on your vehicle before purchasing. Double Contact Bayonet Base: One of the two parallel lugs is higher than the other base. Note: When using as turn signal light, you may need to use load resistors to eliminate hyper flash. Reverse the polarity and flip the bulb if it doesn't light up. Flicker: Try slightly raising the LED bulb's metal pin and reinsert to improve connectivity. Color: Silver Material: PCB Package Contents: 2x LED Bulb Only the above package content is included; other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm.