1. Introduction
Thank you for choosing the VASTFIRE 365NM UV Flashlight. This high-performance ultraviolet lamp is designed for a wide range of detection and curing applications, offering a pure 365nm UV output with a professional-grade filter. This manual provides essential information for the safe and effective use of your device.
The VASTFIRE UV Flashlight emits high-quality ultraviolet radiation at a wavelength of 365nm, filtered to block unwanted visible light, ensuring the purest form of UV output. It features an unparalleled long-distance and high-intensity beam, capable of reaching over 60 feet.
2. Package Contents
- VASTFIRE 365NM UV Flashlight (battery pre-installed)
- Type-C USB Charging Cable
3. Setup and Charging
3.1 Initial Setup
The battery is pre-installed in the device. Before first use, please remove any insulation board that may be present between the battery and the contacts.
3.2 Charging the Flashlight
Your VASTFIRE UV Flashlight is equipped with a Type-C fast charging interface and an intelligent LCD display to show the battery percentage.
- Locate the Type-C charging port on the flashlight body.
- Connect the provided Type-C USB cable to the flashlight.
- Connect the other end of the USB cable to a suitable power source such as a power bank, wall charger, laptop, or car charger.
- The LCD display will show the charging progress. A red indicator light typically signifies charging, while a green light indicates a full charge.

Figure 1: Type-C Charging with various power sources (Power Bank, Wall Charger, Laptops, Car Charger)

Figure 2: Type-C Fast Charging Interface with charging (red) and full charged (green) indicators
4. Operating Instructions
4.1 Power On/Off and Mode Selection
The flashlight features a waterproof push-type switch for easy operation.
- To Turn On/Off: Press the power button once to turn the lamp ON. Press it again to turn the lamp OFF.
- Mode Selection: The flashlight supports two modes: Strong and Weak. Press the power button to cycle between these modes.

Figure 3: Waterproof switch operation. Green light indicates >30% power, Red light indicates ≤30% power.
4.2 Battery Level Indicator
The flashlight is equipped with an intelligent LCD display that shows the current battery percentage, allowing you to monitor power levels at a glance.

Figure 4: Intelligent LCD display showing battery percentage
5. Specific Uses and Applications
The VASTFIRE 365NM UV Flashlight is versatile and can be used for numerous tasks:
- Detection: Pet urine, scorpions, bed bugs, cat ringworm, bathroom stains, fluorescent agents, mechanical flaws, antique porcelain traces, jade and amber recognition, currency identification, and fluorescent anti-counterfeiting.
- Inspection: Hydraulic leak detection, oil detection (for oils with fluorescent components), cotton fiber inspection.
- Curing: UV glue curing, resin curing, nail polish curing.
- Hobbies: Finding uranium glass, lighting up UV paint, rockhounding (identifying fluorescent rocks and minerals).
- Cleaning: Deep cleaning helper for detecting hard-to-see stains on carpets, sofas, walls, and bathrooms.

Figure 5: Visual examples of specific uses for the UV flashlight

Figure 6: More visual examples of UV flashlight applications

Figure 7: Using the UV flashlight as a deep cleaning helper for detecting hidden stains
6. Maintenance and Care
- Cleaning: Wipe the flashlight body with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the flashlight in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For prolonged storage, it is recommended to fully charge the battery and then store the flashlight. Recharge periodically if not used for a long time to maintain battery health.
7. Troubleshooting
7.1 Frequently Asked Questions (FAQ)
- Lamp Fails to Illuminate: Check the power supply (battery charge level) or whether the bulb is damaged. Ensure the insulation board has been removed if it was present.
- Flickering Light: This may indicate poor electrical contact. Ensure the battery is properly seated and contacts are clean. If the issue persists, the battery may need replacement or further inspection.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | VASTFIRE |
| Model | Lamp |
| Power | 140W |
| Body Material | Aluminum Alloy |
| Lamp Bead | 7 * 365nm UV lamp, 28 cores |
| Purple Light Wavelength | 365NM |
| Power Supply | Detachable Battery (3x18650 6600mAh battery pack) |
| Charger | Rechargeable (Type-C USB) |
| Switch Type | Push Type |
| Switch Mode | High/Low (Strong and Weak) |
| Support Dimmer | 2 - 4 Files |
| Display | Charge display effect (Intelligent LCD) |
| Lens Color | Black |
| Focal Length | Non-adjustable, Fixed Focus |
| Waterproof | Yes |
| Function | Shock Resistant, UV |
| Dimensions | 165mm (Length) x 58mm (Head) x 49mm (Tail) |
| Weight | 472g |

Figure 8: Flashlight dimensions
9. Safety Warnings
- Avoid Damp Environments: Do not use the flashlight in humid conditions or expose it to water.
- Keep Out of Reach of Children: Prevent accidental operation by children.
- UV Radiation: Avoid direct exposure of UV light to eyes and skin for prolonged periods. UV light can be harmful.
- Heat: The flashlight may become warm during extended use. Handle with care.
10. Warranty and Support
For any issues, questions, or support needs regarding your VASTFIRE 365NM UV Flashlight, please contact customer service. Refer to your purchase documentation for specific warranty details.