Bulbs HB4

HB4 automotive light bulbs: type, uses, characteristics

HB4 are single-filament halogen lamps, as indicated by the letter H. Some manufacturers of spare parts also offer xenon (HID) or LED light sources under the same designation. The letter B indicates that the component has an oval-shaped envelope, which is able to withstand high inner pressure. Such parts are mostly used in the Japanese and American car industries.

Where are they installed?

HB4 automotive bulbs are installed in headlight assemblies, where they are responsible for low beam and fog lights. They are not used in other car lighting units. They have a P22d base. Their output is 51W or 55W and the voltage is 12V.

Characteristics

The envelope of halogen versions is made of quartz glass and able to withstand high temperatures without blooming or cracking. LED light sources consist of a group of semiconductors, which don’t change colour temperature during operation and consume minimal power despite their high light intensity. The headlight assemblies on some cars are not designed for use of such components, so you need to make sure that their installation on your car is possible if you want to buy HB4 LED lamps. This is also true for xenon (HID) ones.

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How to choose HB4 automotive bulbs

You should always go by the car manufacturer’s recommendations and the specifications of the parts already installed on your car when choosing light bulbs. Keep in mind that each light requires a specific type. Installing components that don’t match the specifications of the standard equipment is prohibited – you can damage the light and could get a traffic penalty.