Alla Lighting T25 3157 LED Switchback Bulbs Xtremely Super Bright Dual Color 6000K White/Amber Yellow LED 3457 3057 4157 4057 3157 LED Bulbs for Cars Trucks SUVs Turn Signal Blinker Lights/DRL (2pc) (Set of 2) This type 3157 LED switchback bulbs are compatible with both standard & CK/SRCK socket. LED Type: 28 pieces high power & high quality 2835 SMD led chips per 3157 LED bulb. Light 6000K xenon white for parking lights or daytime running lights (DRL). Light up amber-off-amber-off for turn signal lights instead of amber all the time to make more noticeable Fitment: 3047, 3057, 3157, 3457, 4157, 5702, 4114, 4057, 3757, 3357, 3157-SCK,3157-SRCK,3157-SACK, etc. Dimension (inches): 0.70 in diameter, 2.50 in length 50W 6ohm load resistor maybe required to avoid the signal hyper flash. Warranty: 1 year hassle-free warranty. Working Voltage: 12V ~ 18V DC Energy-Saving, Low temperature, Low Power Consumption, Longer lifespan up to 50,000 Hours, brightest led switchback in the market.