"retrofit" - Royalin Lighting

2026 About Us

Meet Royalin Lighting, a China-based automotive lighting sourcing and supply chain partner helping overseas businesses source, evaluate, consolidate and deliver suitable products.

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2026 Royalin Lighting homepage redesign draft for internal review.

Headlight projector lens showing its optical structure and controlled beam pattern

Purchase Guide

What Is a Projector Lens in a Car Headlight?

Learn how a headlight projector lens works, why beam pattern matters, and what retrofit shops should check when choosing Bi-LED projector lenses.

Low beam and high beam patterns compared on a dark road

Purchase Guide

Low Beam vs High Beam: What Is the Difference?

Learn the difference between low beam and high beam, how Bi-LED projectors switch between them, and what retrofit shops should check before buying.

Projector vs reflector headlights beam pattern comparison for automotive lighting upgrade

Purchase Guide

Projector vs Reflector Headlights: Which Is Better for Night Driving?

Projector and reflector headlights use different optical systems to shape road illumination. This guide compares beam control, night-driving performance, retrofit use and the key factors B2B buyers should check.

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2026 About Us

2026 Home

What Is a Projector Lens in a Car Headlight?

Low Beam vs High Beam: What Is the Difference?

Projector vs Reflector Headlights: Which Is Better for Night Driving?

ZA2 Matrix Single Core Bi-LED

Royalin-Lighting Matrix Bi-LED One Core 1.5 inch For Motorcycle Bike Automotive Head Lamp Retrofit

ZA1 Matrix Dual Core Bi-LED

Royalin-Lighting Matrix Bi-LED Dual Core 1.5 inch For Motorcycle Bike Automotive Head Lamp Retrofit

ZM1 Mini Dual Core Bi-LED

Royalin-Lighting Mini Bi-LED 3.0 inch Dual Core For Car Head Lamp H1 H4 9005 9006 Retrofit

ZC6 Quadruple Laser Bi-LED

Royalin-Lighting Quadruple Laser Projector Lens Bi-LED H7 For Car Head Lamp H1 H4 9005 9006 Retrofit

ZC5 Triple Laser Bi-LED H7

Royalin-Lighting Triple Laser Projector Lens Bi-LED H7 For Car Head Lamp H1 H4 9005 9006 Retrofit

ZC4 Double Laser Bi-LED H7

Royalin-Lighting Double Laser Projector Lens Bi-LED H7 For Car Head Lamp H1 H4 9005 9006 Retrofit

ZC3 Single Laser Bi-LED H7

Royalin-Lighting Single Laser Projector Lens Bi-LED H7 For Car Head Lamp H1 H4 9005 9006 Retrofit

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