Introduction
Thank you for choosing the Vastfire 17 LED 5000 Lumen Rechargeable Bike Light Set. This manual provides essential information for the safe and efficient use of your new bike light set. Please read it thoroughly before installation and operation, and retain it for future reference.
What's in the Box
Carefully unpack all components and check against the list below:
- 1x 17 LED Bike Headlight
- 1x Rear Bike Light
- 1x Charging Adapter
- 1x Type-C Charging Cable
- 2x Screws
- 1x Wrench
- 2x Aluminum Brackets
- 2x Thick Plastic Gaskets
- 2x Non-slip Silicone Gaskets

Image: All components included in the Vastfire bike light set packaging, laid out for inspection.
Setup
1. Charging the Lights
Before first use, fully charge both the headlight and taillight. The headlight features a digital power display to monitor charging progress and battery level.
- Connect the Type-C charging cable to the headlight's USB-C port and the charging adapter.
- Plug the adapter into a power source. The digital display will show charging status.
- The taillight is also USB rechargeable. Connect it to a USB power source using its integrated USB connector.

Image: The headlight and taillight demonstrating their USB charging capabilities, including the headlight's power bank function.
2. Headlight Installation
The headlight uses a dual-nut aluminum bracket system for secure mounting on your bicycle handlebars.
- Choose the appropriate plastic or silicone gasket based on your handlebar diameter to ensure a snug fit within the aluminum brackets.
- Install the aluminum brackets onto your bicycle handlebar.
- Adjust the angle of the brackets and insert the bike light into the groove.
- Tighten the screws using the provided wrench to secure the light firmly in place. Ensure the light is stable and does not wobble, even on bumpy terrain.

Image: Visual guide illustrating the four steps for securely mounting the headlight to bicycle handlebars.
3. Taillight Installation
The taillight features a simple strap mechanism for quick and easy attachment to your seat post.
- Wrap the taillight's strap around your bicycle's seat post.
- Secure the strap to ensure the taillight is facing backward and is visible.

Image: The taillight attached to a bicycle seat post, demonstrating its visibility and ease of installation.
Operating Instructions
1. Headlight Operation
The headlight offers multiple lighting modes for various riding conditions. Press the power button to cycle through modes.
- Floodlight Mode: Provides a wide, even beam for general illumination.
- Spotlight Mode: Focuses the beam for longer distance visibility.
- High Beam Mode: Combines floodlight and spotlight for maximum brightness (5000 lumens).
- Strobe Mode: Flashing light for increased visibility in emergency situations.
The digital power display shows the remaining battery life in real-time, allowing you to plan your rides accordingly.

Image: The headlight's digital display showing battery status and the various lighting modes available.
2. Taillight Operation
The taillight also features multiple modes to enhance your safety and visibility from the rear.
- Strong Mode: Constant bright red light.
- Slow Flash Mode: Slow pulsing red light.
- Flashing Mode: Rapid flashing red light.
- Fast Flash Mode: Very rapid flashing red light.

Image: The taillight demonstrating its four distinct flashing and steady modes for rear visibility.
3. Power Bank Functionality
The headlight can serve as an emergency power bank for your electronic devices.
- Connect your smartphone or other USB-C compatible device to the headlight's USB-C output port.
- The headlight will begin charging your device. This feature is ideal for emergency charging on the go.

Image: The headlight charging a smartphone via its USB-C output, highlighting its power bank feature.
Maintenance
To ensure the longevity and optimal performance of your Vastfire bike light set, follow these maintenance guidelines:
- Cleaning: Wipe the lights with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the lights in a cool, dry place when not in use. Avoid prolonged exposure to direct sunlight or extreme temperatures.
- Battery Care: For optimal battery life, charge the lights regularly, even if not used frequently. Avoid completely draining the battery before recharging.
- Water Resistance: The lights are IPX7 waterproof, meaning they can withstand heavy rain and splashes. However, avoid submerging them in water for extended periods. Ensure the USB-C port cover is securely closed to maintain water resistance.

Image: The headlight operating effectively in rainy conditions, showcasing its robust and waterproof construction.
Troubleshooting
If you encounter any issues with your bike light set, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | Low battery; Power button not pressed correctly | Charge the light fully; Press and hold the power button for 2-3 seconds. |
| Light not charging | Cable or adapter issue; Port not connected properly | Ensure cable and adapter are functional; Check USB-C connection; Try a different charging source. |
| Headlight wobbles on handlebars | Mounting screws loose; Incorrect gasket size | Tighten the mounting screws with the provided wrench; Ensure correct gasket is used for handlebar diameter. |
| Digital display inaccurate | Temporary software glitch | Recharge the light fully; If issue persists, contact customer support. |
Specifications
| Feature | Detail |
|---|---|
| Brand | VASTFIRE |
| Model Name | US-SPCYY0757K1 |
| Light Output (Max) | 5000 Lumens |
| Number of Settings | 4 (Headlight), 4 (Taillight) |
| Power Source | Battery Powered (USB Rechargeable) |
| Material | Aerospace-grade Aluminum Alloy (Headlight) |
| Water Resistance Level | IPX7 Waterproof |
| Product Dimensions | 2"L x 1"W x 5.91"H |
| Mounting Type | Rack Mount (Headlight), Strap (Taillight) |
| Special Features | Digital Power Display, USB-C Input/Output (Power Bank) |
Product Videos
VASTFIRE Super Bright Bicycle Light Overview
Video: This video provides a general overview of the VASTFIRE Super Bright Bicycle Light, showcasing its features and components.
Vastfire 17 LED High Lumens Bike Lights Demonstration
Video: A demonstration of the Vastfire 17 LED High Lumens Bike Lights, highlighting their brightness and various modes in action.
Warranty and Support
The Vastfire 17 LED 5000 Lumen Rechargeable Bike Light Set comes with a lifetime warranty. For any product-related inquiries, technical support, or warranty claims, please contact Vastfire customer service through the retailer's platform or the official Vastfire website.
We are committed to delivering premium products and ensuring every outdoor adventure is both safe and thoroughly enjoyable.




