Introduction
The Sofirn HS40 is a versatile and powerful USB-C rechargeable headlamp designed for various outdoor activities and everyday carry (EDC). Featuring a super bright SST40 LED, it delivers an amazing output of up to 2000 lumens with a maximum throw of 175 meters. Its robust construction, multiple brightness modes, and convenient charging make it an ideal lighting tool for running, hiking, camping, fishing, and more.
Sofirn HS40: Amazing Output, 2000 Lumens, 1*SST40 LED, Max Throw 175 Meters, 50000 Hours Lifespan.
Package Contents
Please check the package for the following items:
- Sofirn HS40 Headlamp
- Headstrap
- 18650 Li-ion Battery (3000 mAh)
- USB-C Charging Cable
- Pocket Clip
- Spare O-rings
- User Manual (this document)
- (Optional) 18350 Battery Tube Adapter
Sofirn HS40 Headlamp and standard accessories.
Specifications
| Feature | Detail |
|---|---|
| Emitter | 1x SST40 LED (50,000 hours lifespan) |
| Battery | 18650 Li-ion (3000 mAh included), compatible with 18350 (with adapter) |
| Operating Voltage | 2.7V - 4.2V |
| Dimensions | 111mm (length) × 26mm (head diameter) × 25mm (body diameter) |
| Weight | 65 grams (without battery, without headstrap) |
| Body Material | Aerospace grade 6061 aluminum alloy, CNC manufactured, hard-anodized (military grade type III), anti-abrasive finish |
| Lens | Toughened mineral glass, scratch and wear-resistant |
| Waterproof Rating | IPX8 (up to 2 meters underwater, not for diving) |
| Impact Resistance | 1 meter |
| Charging | USB-C port, input DC 5V 2A |
| Max Output | 2000 lumens |
| Max Throw | 175 meters |
| Beam Angle | 180° |
| LED Color Temperature | 5000K / 6500K options |
| Certifications | ROHS, CE |
Sofirn HS40 Performance Data and Features.
Brightness Modes and Runtimes (with 18650 battery)
| Mode | Lumens (lm) | Runtime (hrs) | Throw (m) | Candela (cd) |
|---|---|---|---|---|
| Moonlight | 1 | 400 | - | - |
| Low | 10 | 220 | 21 | 107 |
| Medium | 300 | 8 | 68 | 1150 |
| High | 800 | 2 | 129 | 4137.5 |
| Turbo | 2000 | 2.5 | 175 | 7625 |
| Strobe | 2000 | 5 | - | - |
| SOS | 300 | 22.5 | - | - |
| Beacon | 2000 | 11.25 | - | - |
Note: Runtimes are approximate and may vary based on battery condition and environmental factors.
Setup
1. Battery Installation
Unscrew the tailcap of the headlamp. Insert the provided 18650 Li-ion battery with the positive (+) end facing towards the head of the lamp. Carefully screw the tailcap back on, ensuring it is tightened securely to maintain waterproof integrity and proper electrical contact.
If using an optional 18350 battery tube adapter, replace the standard 18650 body tube with the shorter 18350 tube and insert an 18350 battery with the positive (+) end towards the head.
18650 and 18350 Battery Tube Comparison.
2. Attaching the Headstrap
Thread the headlamp through the silicone mounts on the headstrap. Adjust the strap to fit comfortably and securely around your head.
Operating Instructions
The Sofirn HS40 features both stepped and stepless (ramping) brightness modes, along with special modes for various situations.
Basic Operation (Stepped Mode)
- Turn On/Off: Single click the side switch.
- Change Brightness: From ON, press and hold the side switch to cycle through Low, Medium, High. Release the switch to select the desired brightness level.
- Moonlight Mode: From OFF, press and hold the side switch for 1 second to activate Moonlight mode.
- Turbo Mode: From ON, double-click the side switch to activate Turbo. Double-click again to return to the previously used mode.
- Special Modes (Strobe/SOS/Beacon): From ON, triple-click the side switch to activate Strobe. Double-click from Strobe to cycle through SOS and Beacon. Single click to turn off or return to the previously used mode.
Stepless Dimming (Ramping Mode)
The HS40 also offers a stepless dimming mode for fine-tuning brightness.
- Activate Ramping: From ON, press and hold the side switch for approximately 2 seconds until the light starts ramping.
- Adjust Brightness: While ramping, continue to hold the switch to ramp up or down. Release the switch at your desired brightness.
- Change Ramping Direction: Release the switch and press and hold again within 1.5 seconds to reverse the ramping direction.
- Memory Function: The headlamp will remember the last used brightness level in ramping mode when turned off and on again.
Stepless and Stepped Brightness Modes.
Power Indicator
The headlamp features a power indicator light near the switch:
- Green Light: Indicates sufficient battery power.
- Red Light: Indicates low battery power, requiring a recharge.
Charging
The Sofirn HS40 is equipped with a convenient USB-C charging port. To charge the battery:
- Locate the USB-C port cover on the headlamp body.
- Open the rubber cover to expose the USB-C port.
- Connect the provided USB-C cable to the headlamp and plug the other end into a 5V/2A USB power source (e.g., wall adapter, power bank, computer USB port).
- During charging, the indicator light will glow Red.
- Once charging is complete, the indicator light will turn Green.
- Disconnect the cable and securely close the rubber port cover to maintain water resistance.
USB-C Charging with Red (Charging) and Green (Full) Indicators.
Maintenance
- Cleaning: Regularly clean the threads and O-rings of the headlamp. Apply a thin layer of silicone grease to the O-rings to prevent wear and maintain water resistance.
- O-ring Replacement: If the O-rings appear damaged or worn, replace them with the provided spare O-rings to ensure the headlamp remains waterproof.
- Lens Care: Clean the toughened mineral glass lens with a soft, clean cloth to remove dirt or smudges. Avoid abrasive materials that could scratch the lens.
- Battery Storage: If the headlamp will not be used for an extended period, it is recommended to remove the battery to prevent potential leakage or damage. Store the battery in a cool, dry place.
- Magnetic Tailcap: The magnetic tailcap allows for hands-free use by attaching the headlamp to metal surfaces. Keep the magnet clean for optimal adhesion.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | Battery incorrectly installed or depleted. Loose tailcap. | Ensure battery is inserted with positive (+) end towards the head. Charge the battery fully. Tighten the tailcap securely. |
| Light flickers or is unstable | Low battery charge. Dirty or corroded contacts. Loose tailcap. | Recharge the battery. Clean battery contacts and headlamp contacts with a cotton swab and rubbing alcohol. Tighten the tailcap. |
| Headlamp gets hot in Turbo mode | Normal operation for high output. | The headlamp features automatic stepdown from Turbo to High mode to prevent overheating. This is a safety feature and normal behavior. |
| Headlamp only works in Moonlight mode after impact | Internal damage from impact. | Inspect for visible damage. If the issue persists after checking battery and contacts, contact customer support for assistance. |
User Tips
- Brightness Stabilization: The Sofirn HS40 features brightness stabilization, meaning it attempts to maintain a consistent light output as the battery drains, rather than dimming gradually.
- Turbo Mode Stepdown: Be aware that the Turbo mode will automatically step down to a lower brightness level (typically High mode) after approximately 2-3 minutes of continuous use. This is a crucial safety mechanism to prevent the LED from overheating and prolong the lifespan of the headlamp and battery.
- LED Color Temperature: The HS40 is available in 5000K (warmer, more natural light) and 6500K (cooler, whiter light) options. Choose the color temperature that best suits your personal preference and intended use. Many users prefer 5000K for outdoor activities as it can offer better color rendition.
- Versatile Use: Beyond wearing it as a headlamp, utilize the included pocket clip to attach it to clothing or gear, or use the magnetic tailcap to secure it to metal surfaces for hands-free illumination. It can also be used as a compact handheld flashlight.
The Sofirn HS40 offers multiple usage options for diverse scenarios.
Warranty and Support
Sofirn provides a 1-year hardware warranty for the HS40 headlamp against manufacturing defects, excluding damage caused by personal error or misuse. For any issues or support inquiries, please contact the seller or Sofirn customer service directly. Please retain your proof of purchase for warranty claims.
Additionally, the product may be eligible for free returns within 90 days, depending on the purchase platform's policies.
