USB Rechargeable LED Book Light – 3 Colors & Dimming

USB Rechargeable LED Book Light with 3 Color Modes & Stepless Dimming

Transform your reading, studying, or late-night work sessions with this versatile USB Rechargeable LED Book Light. Featuring three distinct color modes and infinitely adjustable brightness, this compact desk lamp adapts perfectly to any environment — from bedside reading to office tasks. Made in Mainland China.

3 Color Modes for Every Setting

• Cool White – Crisp, bright light ideal for focused reading and studying
• Warm Yellow – Soft, cozy glow perfect for winding down at night
• Warm White – Balanced neutral tone great for general desk use

Simply press the button to cycle through modes, or long-press to steplessly adjust brightness anywhere between the lowest and highest levels — no harsh jumps, just smooth, continuous dimming.

Built-In Rechargeable Battery

Powered by a 400mAh polymer lithium-ion battery, this light charges fully in approximately 1.5 hours via the included 0.25m USB data cable. A red indicator light shows when charging is in progress; it turns green when fully charged. Once fully charged:

• Low brightness: Up to ~24 hours of continuous use
• High brightness: ~3–5 hours of continuous use

Key Specifications

• Light Source: LED Bulbs
• Rated Power: 3W
• Rated Voltage: 5V
• Rated Current: 1A
• Battery Capacity: 400mAh Polymer Lithium-Ion
• Charging Time: ~1.5 hours
• Luminous Flux: 60–249 lm
• Colors Available: White / Black
• Certification: CE
• Country of Origin: Mainland China

How to Use

1. First press: Cool white light
2. Second press: Warm yellow light
3. Third press: Warm white light
4. Fourth press: Turn off
5. Long press (while on): Steplessly adjust brightness up or down

Note: This lamp does not have a memory function — it will default to cool white on the next power-on.

Perfect For

• Bedside reading without disturbing a partner
• Studying and homework sessions
• Office and desk work
• Travel and on-the-go use
• Dorm rooms and small spaces

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For more information on LED lighting energy efficiency, visit the U.S. Department of Energy – LED Lighting Guide.

Learn more: Light fixture

Frequently Asked Questions

Q: How long does it take to fully charge the USB LED book light?

A: The built-in 400mAh polymer lithium-ion battery takes approximately 1.5 hours to fully charge via the included USB cable. The red indicator light turns green once charging is complete.

Q: Can I use this LED book light while it is charging?

A: Yes, you can use the light while it is connected to a USB power source, making it flexible for both plugged-in and portable, cordless use.

Q: How do I switch between the 3 color modes?

A: Press the button once for cool white, twice for warm yellow, and a third time for warm white. A fourth press turns the light off. Long-press while the light is on to smoothly adjust brightness to your preferred level.

Q: Is this book light suitable for use in a dark bedroom without disturbing others?

A: Absolutely. The stepless dimming feature allows you to set the brightness to a very low level, making it ideal for bedside reading without creating too much ambient light in the room.