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In this text, we’ll focus on just one type of bulb – the H7 bulb. Look closely at an H7 bulb, and you’ll see that there's only one wire inside. These bulbs are full of xenon gasoline, which creates a brighter light. Xenon bulbs additionally tend to have a cooler colour temperature, which means they appear bluer than the yellow glow of a halogen bulb. Another method by which bulbs differ from one another is within the number of filaments. Filaments are tiny wires that, in a conventional halogen bulb, conduct electrical energy and get hot enough to sup