Product Specifications

The P21/5W is a dual-power focused vehicle lighting bulb with a rated voltage of 12V, supporting two working modes of 21W high power and 5W low power, and is compatible with the dedicated BA15d dual-contact bayonet base. In the model designation, "P" stands for the parabolic reflective structure; the light can achieve directional focusing after being reflected by the inner wall, featuring a long irradiation distance and high brightness concentration, which is suitable for scenarios requiring precise lighting. "21/5W" is the core identifier of dual power, which can realize circuit switching through the dual contacts of the base to meet the lighting needs of vehicles in different scenarios.

The BA15d base has a diameter of 15mm. Its dual-contact design can accurately 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 scenarios requiring high-light warning such as brake lights and reversing lights; the 5W low-power mode has low 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 cost-effective and practical accessory for automotive rear lighting systems.