Product Specifications

The P21/4W is a dual-power focused vehicle lighting bulb with a rated voltage of 12V, supporting two working modes of 21W high power and 4W low power, and is compatible with the dedicated BAZ15d 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 high brightness concentration, which is suitable for scenarios requiring precise lighting. "21/4W" is the core identifier of dual power, which can realize circuit switching through the dual contacts of the base to meet different lighting needs.

The BAZ15d base has a diameter of 15mm. Its dual-contact offset-pin design can not only prevent reverse installation of the bulb, but also 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 high-light warning scenarios such as brake lights and reversing lights; the 4W 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 practical accessory for automotive rear lighting systems.