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Which Headlight Bulb Is Low Beam?

Maya Lin-Takahashi • • 3 min read
Which Headlight Bulb Is Low Beam?
★ Key Takeaways

With the Lower Filament On, the Bulb Acts as the Low Beam. with Both On, the Bulb Is Brighter and Functions as a High Beam Headlight. the Most Common Dual Filament Bulb Used in Headlights Is the 9003 (Hb2/H4) Bulb.

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Direct Answer • Key Takeaway

With the Lower Filament On, the Bulb Acts as the Low Beam. with Both On, the Bulb Is Brighter and Functions as a High Beam Headlight. the Most Common Dual Filament Bulb Used in Headlights Is the 9003 (Hb2/H4) Bulb.

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Maya Lin-Takahashi
Author

Maya Lin-Takahashi

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.