The 9004 bulb is a dual beam lamp with two filaments, commonly used as a replacement for headlights in many vehicles. It utilizes halogen technology and can be used in both projector and reflector headlights. The nominal power for this bulb is 12 volts and 65 watts for the high beam filament, and 12 volts and 45 watts for the low beam filament. The bulb has a P29t base and produces around 1700 lumens with a color temperature of 3200K. The usual lifespan for this bulb is around 1-2 years. The name 9004 is deciphered as follows: 90 refers to the bulb's diameter in millimeters, and 04 refers to its length in tenths of a millimeter. The 9004 bulb is interchangeable with the HB1 bulb type.
9004 Light Bulb
