H4666 Light Bulb


The H4666 automotive bulb is a popular replacement part for headlights and fog lights. It is a halogen bulb that utilizes a single beam with one filament. It is commonly used in reflector headlights. The bulb has a nominal power of 12 volts and 100 watts, producing 1650 lumens and a color temperature of 3200 kelvins. The H4666 bulb uses a P43t base and has a lifespan of around 2 years. Its name is deciphered as H for halogen, 46 for the bulb type, and 66 for the wattage. This bulb is interchangeable with other H4 bulbs such as the 9003, HB2, and H4.


The H4666 light bulb family is interchangeable with the following bulbs