3156 3157 LED Bulb Backup Tail Lights High Performance: T25 3156/3157 Turn Signal Bulb with Turbo Fan Color: White Heat Dissipation: Aluminum Body/Turbo Fan/Heat Sink Holes Lifespan: Built-in smart IC driver for stable current control and longer lifespan up to 50000 Hours Equipped with aluminum heat sink and 15,000 RPM silent fan for the best heat dissipation. Especially designed for replacing front/rear turn signal lights, tail lights, reverse bulbs, side marker lights and blinker lights. Dual Brightness: The Dim mode is Tail lights, while the Bright mode is Turn signal lights. The bulb run in Bright mode when your bulb only function in one mode.

