Socket :1156 P21W BA15S1156 PY21W BAU15S1157 P21/5W BAY15DT20 7440 W21W WY21WT20 7443 W21/5WPeculiarity:(1) Advanced LED lamp beads, with high brightne and low temperature characteristics, high-quality aluminum alloy, to achieve excellent heat diipation, to ensure the safety and durability of bulbs.(2) Match with the original incandescent lamp, plug and play, 360 degrees of light, full of light.(3) Using CANBUS system, built-in stable constant current IC driver, to solve 95% of vehicle error code/super flash problems on the market.Voltage: DC12VPower: 20w(single contact),3w/10w (double contact)Lumens: 4000LMNumber of LEDs:3030-44SMDColor: White/Amber Yellow/RedMaterial: LED+aluminiumApplication: Car, motorcycle, truck, SUV, ATV, etc.Heat Diipation Theory : Aviation aluminum 6063Waterproof: IP67Working temperature: -40C~+80CSystem Lifespan:80000 hoursUsage:Turn signals, Brake lights, Reversing lights, Daytime running lights.Package: 2Pcs LED BulbsDisclaimer about CANBUS: This LED bulb has high power, built-in Canbus load resistance, avoiding error codes or Hyper Flash and more, and is only suitable for 95% of car CANBUS. If the following conditions occur after installing the bulb, you need to purchase an additional decoder. this is not a quality problem with the bulb! If you mind, please place your order with caution. 1. The bulb does not light up or the bulb is on for a while, then it goes out or the bulb flashes. 2. The dashboard displays an error code or the radio is disturbed. 3.The bulb was still glowing slightly when the power was cut off. How can buyers verify that the bulb itself is working properly? The buyer uses the bulb to connect directly to the DC12V power supply and check the bulb without going through the car computer.