The Bosch Pure Light P21/4W is a high-quality automotive bulb designed to provide efficient and reliable lighting for specific vehicle applications. Operating at 12 volts, this bulb features a power rating of 21/4 watts. The P21/4W base type makes it suitable for certain automotive lighting fixtures. The Bosch Pure Light P21/4W is commonly used for brake lights and tail lights, where it delivers a dual-function light output - 4 watts for parking or running lights and 21 watts for brake lights. This bulb is engineered for a precise fit and easy installation, ensuring compatibility with various vehicle models. As with all Bosch products, the Pure Light P21/4W adheres to Bosch's high standards of quality and durability, providing long-lasting and dependable performance