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These bulbs are crammed with xenon fuel, which creates a brighter mild. Xenon bulbs additionally are probably to have a cooler color temperature, which means they appear bluer than the yellow glow of a halogen bulb. Another way during which bulbs differ from one another is in the variety of filaments. Filaments are tiny wires that, in a standard halogen bulb, conduct electricity and get scorching sufficient to provide gentle. have either one or two filaments. To perceive precisely what an H7 bulb is, you’ll must know a little about automotive bulbs i