This bulb is compatible for both CK/SRCK and standard socket with Non-polarity design. Best value in the market! Features Dual Brightness: The Dim mode is Tail lights or DRL, while the Bright mode is Brake lights or Turn Signal lights. High Brightness LED: 54SMD 3014 chipset & 3SMD 3030 chipset. Working Voltage: 9-30V (fit 12V, 24V vehicles). …