Product Specifications

The W21/5WNB is a dual-power multi-functional vehicle warning bulb with a rated voltage of 12V, featuring two working modes: 21W high power and 5W low power. It emits natural blue light and is compatible with the W3x16q dual-contact wedge base. In the model designation, "W" stands for the wide-angle lighting structure, which has a broad light scattering range and high visibility at night; "21/5W" is the core identifier of dual power, enabling circuit switching through the dual contacts of the base; "NB" corresponds to Natural Blue, whose light is soft and refreshing, different from ordinary high-brightness blue light and not easy to cause glare.

The W3x16q dual-contact base features a precise design, which can strictly distinguish between high and low power circuits, with convenient plug-and-play operation and stable connection, and is compatible with the taillight and position light assemblies of most passenger vehicles. This bulb adopts proven tungsten filament lighting technology. The 21W high-power mode provides sufficient brightness, which is mostly used for brake lights and turn signals; the 5W low-power mode has lower energy consumption and can be used as the constant-on mode of position lights. The dual-purpose feature simplifies the layout of vehicle lamps, making it a vehicle lighting accessory that balances personalization and practicality.