Product Specifications

The W21W is a mainstream vehicle lighting bulb with a rated voltage of 12V and a rated power of 21W, compatible with the W3x16d wedge base. The letter "W" in the model indicates that the bulb is a wide-angle lighting type with a broad light scattering range; "21W" refers to its rated power, which delivers higher brightness than low-power bulbs and meets the regular warning and lighting needs of vehicles.

The W3x16d base features a standardized wedge design, which is compact in size and easy to plug and unplug. It can be firmly embedded in lamp slots and is widely compatible with various passenger and commercial vehicles. Adopting tungsten filament lighting technology, this bulb emits warm yellow light with strong penetration, showing excellent visibility in rainy and foggy weather. It is mainly used in key warning lighting positions such as car taillights, brake lights and turn signals, and serves as a common accessory to ensure vehicle driving safety.