1. Introduction
Thank you for choosing the MOSLIGHTING Portable Work Light MOS-LY03. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new work light. Please read this manual thoroughly before use and retain it for future reference.
2. Safety Instructions
- Do not look directly into the LED light when it is on, as this may cause eye damage.
- Keep the device away from extreme temperatures, direct sunlight, and moisture.
- Do not attempt to disassemble, repair, or modify the device. This will void the warranty and may cause damage or injury.
- Use only the provided or certified charging cables and adapters.
- Ensure the charging port cover is securely closed when not charging to maintain IP65 water and dust resistance.
- Keep out of reach of children.
3. Package Contents
Verify that all items are present in your package:
- MOSLIGHTING Portable Work Light MOS-LY03
- USB Charging Cable
- Instruction Manual
- Carabiner (may vary by package)
- Strap (may vary by package)

Figure 3.1: Typical package contents for the MOS-LY03 work light.
4. Product Overview
The MOS-LY03 is a versatile portable work light designed for various applications, featuring high brightness, multiple lighting modes, and a power bank function.

Figure 4.1: Front view of the MOS-LY03 Portable Work Light.
Key Features:
- 4000 Lumens Brightness: Powerful illumination for various environments.
- Adjustable Color Temperature: 7700K (Cool White), 5600K (Neutral White), 3300K (Warm White).
- Stepless Dimming: Fine-tune brightness levels.
- Magnetic Base: Securely attaches to metal surfaces.
- 1/4" Threaded Port: Compatible with tripod stands.
- 12000mAh Power Bank: Recharge other devices via USB.
- IP65 Waterproof: Resistant to dust and water splashes.

Figure 4.2: The four available lighting modes.

Figure 4.3: Multifunctionality: Magnetic base and tripod compatibility.

Figure 4.4: The work light's emergency power bank feature.
5. Setup
5.1 Initial Charging
- Before first use, fully charge the work light.
- Locate the charging port cover on the side of the unit. Open the cover.
- Connect the provided USB charging cable to the Type-C input port on the work light.
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer USB port.
- The battery indicator lights will illuminate to show charging status. All lights will be solid when fully charged.
- Once charging is complete, disconnect the cable and securely close the charging port cover to maintain water resistance.
5.2 Mounting Options
- Magnetic Attachment: The integrated magnetic base allows the light to be securely attached to any ferrous metal surface, such as car hoods, metal beams, or toolboxes.
- Tripod Mounting: The 1/4" threaded port on the base allows for attachment to standard camera tripods or light stands for versatile positioning.
- Adjustable Stand: The built-in stand can be adjusted to direct the light beam at various angles.
6. Operating Instructions
6.1 Power On/Off and Mode Selection
- Power On: Press the power button once to turn on the light. It will typically start in the last used mode or a default white light mode.
- Change Mode: Press the power button repeatedly to cycle through the available lighting modes: 7700K (Cool White), 5600K (Neutral White), 3300K (Warm White), and SOS (Red Flashing).
- Power Off: Press and hold the power button for approximately 2 seconds to turn off the light from any mode.
6.2 Brightness Adjustment (Stepless Dimming)
- While the light is on in any of the white light modes (7700K, 5600K, 3300K), press and hold the power button (after a quick press to select the mode) to activate stepless dimming.
- The brightness will gradually increase or decrease. Release the button when the desired brightness level is reached.
- To change the dimming direction, release the button and press and hold it again.
6.3 Using as a Power Bank
- Open the charging port cover.
- Connect your device's USB charging cable to the USB-A output port on the work light.
- The work light will begin charging your device. The battery indicator lights will show the remaining power of the work light.
- Disconnect your device when charging is complete and securely close the port cover.
7. Maintenance
7.1 Cleaning
- Ensure the device is turned off and disconnected from any power source before cleaning.
- Wipe the exterior with a soft, damp cloth. Do not use abrasive cleaners, solvents, or harsh chemicals.
- Ensure the charging port cover is closed during cleaning to prevent water ingress.
7.2 Storage
- Store the work light in a cool, dry place, away from direct sunlight and extreme temperatures.
- For long-term storage, charge the battery to approximately 50-70% every 3-6 months to prolong battery life.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | Low battery. | Charge the work light fully. |
| Power button not pressed correctly. | Ensure a firm press of the power button. | |
| Light is dim or flickers. | Low battery. | Recharge the work light. |
| Device not charging from power bank function. | Work light battery is low. | Charge the work light. |
| Incorrect cable or connection. | Ensure the USB cable is properly connected to the output port and your device. Try a different cable. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | MOS-LY03 |
| Brightness | Up to 4000 Lumens |
| Color Temperature | 7700K, 5600K, 3300K |
| Battery Capacity | 12000mAh Lithium Ion |
| Power Source | Battery Powered |
| Waterproof Rating | IP65 |
| Mounting Type | Magnetic, 1/4" Tripod Mount |
| Material | Acrylonitrile Butadiene Styrene (ABS), Glass (Shade) |
| Product Dimensions | 4.72"L x 1.9"W x 5.9"H |
| Item Weight | 1.1 Pounds |
| Voltage | 11.2 Volts |
| Wattage | 50 Watts |
10. Warranty and Support
MOSLIGHTING provides a 180-day free replacement service for this product. If your work light exhibits any defects or ceases to function within this period, please contact our customer service for assistance. We will help troubleshoot the issue or arrange for a replacement product.
For further support or inquiries, please refer to the contact information provided on the product packaging or the official MOSLIGHTING website.
11. Official Product Videos
No official product videos from the seller meeting the specified criteria were found for embedding in this manual.