The 9004 PNP Series LUX LED Replacement Bulbs are a practical and efficient lighting solution. With a one-piece die-cast bulb body, these bulbs offer superior heat dissipation and thermal conductivity. They operate within a wide voltage range of 9-32 volts and come with built-in drivers for easy installation. Sold as a pair, these FCiP ultra-high luminous bulbs provide a high power output, increasing driving distances 2-3 times over halogen bulbs. With a plug and play design and the same size as the halogen bulbs they replace, these bulbs are a convenient and effective choice. Note that newer vehicles may require an in-line Canbus decoder for proper interface. Replacing most 9004 lights, these LED bulbs offer a reliable and efficient lighting solution.