The 21 LED White Ceramic Tower 3156 Bulb is a practical and efficient lighting solution. Sold as a pair, it features 21 LED diodes and is available in white. The built-in ceramic heat sink helps prevent overheating, ensuring a longer lifespan for the bulb. It is also multi-voltage, compatible with 12-24 volts. This bulb is a great choice for those looking for a reliable and energy-efficient lighting option.