Product Specifications

The W21WNB is a distinctive vehicle warning lighting bulb with a rated voltage of 12V and a rated power of 21W, compatible with the standardized W3x16d wedge base. In the model designation, "W" stands for the wide-angle lighting type, which has a broad light scattering range and a clear warning effect; "21W" is the rated power, providing sufficient brightness; "NB" corresponds to "Natural Blue", meaning the bulb emits soft, non-glaring natural blue light, different from ordinary high-brightness blue light.

The W3x16d base features a compact wedge structure, enabling easy plug-and-play operation with a secure lock, and is compatible with the lamp assemblies of most passenger and commercial vehicles. This bulb adopts proven tungsten filament lighting technology. The natural blue light has high visibility at night and does not cause glare interference to drivers of other vehicles. It is mainly used in special lighting positions such as car position lights and side marker lights, serving as a vehicle lighting accessory that balances personalization and practicality.