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What is the difference between HS1 bulbs and H4 bulbs?

1 Answers

DelaneyRose

07/30/25 6:15am

HS1 bulbs and H4 bulbs differ in the following aspects: 1. Power: The power of HS1 bulbs is 35W/35W, while H4 bulbs have a power of 55W/60W. 2. Standard: HS1 is the standard for national motorcycles, whereas H4 is for automotive bulbs. Below is relevant information about the two types of bulbs: 1. H4 Bulbs: H4 bulbs are a specification and model for automotive headlights (also known as main beams). The H4 is a dual-filament, three-pin bulb where both low and high beams are integrated into a single bulb, with standard power ratings of 55W for low beam and 60W for high beam; or 90W for low beam and 100W for high beam. 2. HS1 Bulbs: According to national standards, the headlights of domestic motorcycles must not exceed 35/35W, so the HS1 model is specifically designed for motorcycles (configuration). Otherwise, it would fail factory inspection.

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