Product Specifications

The WY21/5W is a dual-color temperature and dual-power vehicle warning bulb with a rated voltage of 12V, supporting two working modes of 21W high power and 5W low power. It is compatible with the W3x16q dual-contact wedge base and emits amber light. In the model designation, "W" stands for the wide-angle lighting structure, which has a broad light scattering range and high warning visibility; "Y" corresponds to amber, emitting striking yellow light; "21/5W" is the core identifier of dual power, realizing power circuit switching by virtue of the dual contacts of the base.

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. It is compatible with the taillight and turn signal assemblies of most passenger vehicles. Adopting tungsten filament lighting technology, this bulb delivers strong brightness in the 21W high-power mode, which is mostly used for turn signals and hazard warning lights; the 5W low-power mode has low energy consumption and can be used as side marker warning lights. The dual-function integration simplifies lamp configuration, making it a vehicle lighting accessory that balances warning effect and installation convenience.