Product Specifications

The PR21/5W is a dual-power focused vehicle warning bulb with a rated voltage of 12V, supporting two working modes of 21W high power and 5W low power. It emits red light and is compatible with the dedicated BAW15d dual-contact offset-pin bayonet base. In the model designation, "P" stands for the parabolic reflective structure; the light is directionally focused after being reflected by the inner wall, featuring a long irradiation distance and excellent warning focusing effect. "R" corresponds to the red light spectrum, whose light is striking and intuitive, with much higher warning visibility than ordinary warm yellow light. "21/5W" is the core identifier of dual power, which can achieve precise circuit switching through the dual contacts of the base.

The BAW15d base has a diameter of 15mm. Its dual-contact offset-pin design can not only prevent reverse installation of the bulb, but also strictly distinguish between high and low power circuits, with convenient plug-and-play operation and stable connection, and is compatible with the taillight assemblies of most passenger vehicles. This bulb adopts proven tungsten filament lighting technology. The 21W high-power mode delivers strong brightness, which is mostly used in high-light warning scenarios such as brake lights and hazard warning lights; the 5W low-power mode has low energy consumption and can be used as the constant-on mode of rear position lights. The dual-purpose feature simplifies the layout of vehicle lamps, making it a vehicle lighting accessory that balances warning effect and practicality.