What is the difference between H1 and H7 bulbs?

[StBradley]

The most crucial difference between automotive bulbs H1 and H7 is the number of terminals they have. Here are some important points to note when replacing car lights: 1. The replacement bulbs should not be too bright. If you install lenses or change the color, you must register the changes with the vehicle management office in advance; otherwise, the vehicle will not pass the annual inspection. 2. It is best to replace the lights with original factory ones to ensure better quality. Automotive bulbs come in the following models: 1. H1 is a single-filament, single-terminal bulb, mostly used for high beams. 2. H7 is a single-filament, double-terminal bulb, mostly used for low beams. 3. H3 is a special type, generally used in Japanese cars and rarely in other vehicles. 4. H4 is a dual-filament, triple-terminal bulb, combining both low and high beams in one bulb.