The BULB - 12V 21-5W (2 PK) by A & I PRODUCTS is designed for reliable lighting in various applications. This high-quality bulb provides bright illumination while ensuring energy efficiency. Its compact design allows for easy installation in a variety of fixtures. The bulbs are made from durable materials, ensuring longevity and consistent performance. Ideal for automotive and industrial use, this pack of two bulbs meets industry standards for quality and reliability.The 12V 21-5W Bulb 908543D1 from A & I PRODUCTS is a replacement lighting bulb sold in pairs for automotive or machinery applications. It features dual filaments rated at 21 watts and 5 watts, designed for use in indicator, brake, or tail light circuits operating at 12 volts. The bulb base type matches standard sockets for easy installation. Its glass construction and tungsten filaments comply with electrical and illumination standards for vehicle lighting components. The 908543D1 model provides reliable light output and fitment for OEM equipment. Manufactured by A & I PRODUCTS, this bulb set is intended for use in systems requiring dual-intensity 12V bulbs.