The Sofirn HS21 is a T-shaped headlamp featuring an infrared gesture sensor, one spotlight LED, six floodlight LEDs, and three red LEDs. Reviewers praised its hands-free operation and multiple lighting modes, with the floodlight LEDs offering high CRI at 99. However, discrepancies between advertised and measured flood lumens were noted, with some reviewers reporting up to 30% lower output. Build quality concerns regarding bracket durability were also mentioned. This headlamp suits users seeking versatile lighting options with gesture control, though those prioritizing exact lumens may want to consider alternatives.
Full review
Design and Build Quality
The Sofirn HS21 headlamp presents a T-shaped design that distinguishes it from typical headlamp configurations. Constructed from AL6061-T6 aluminium alloy, the unit features a matte black anodised finish that feels substantial in hand. According to Tim McMahon's review, the build quality is solid, with no sharp edges and smooth mechanical components. The headband is comfortable and adjustable, though it uses a newer-style clip-in system rather than traditional silicone loops. The device measures 35.7mm x 45.75mm x 86.5mm and weighs 87g without the battery, making it remarkably lightweight for its output capabilities. However, Reddit user blaffo noted concerns about potential bracket snapping, particularly when removing the headlamp from its mounting bracket. The threads are well-lubricated, and the tailcap includes a mechanical lockout feature. The device incorporates springs on both ends to accommodate various 18650 battery types, including flat-top or button-top configurations, as noted by the 1lumen reviewer.
The HS21's interface combines a button for power and mode selection with a rotary switch for beam type and intensity. The infrared gesture sensor, positioned on the right side, allows for hand-controlled brightness adjustment without physical contact. This sensor is sensitive enough to be triggered accidentally by unintended hand movements, as noted by the BayAreaBohemian user. The device includes a USB-C charging port with an indicator LED, and the included charging cable is a standard USB-A to USB-C configuration. The headlamp also features a unique locking mechanism via the tailcap, which can disconnect the battery when not in use. The overall design balances functionality with user-friendly features, though some users have reported issues with the plastic notch on the bracket wearing down with frequent rotation.
The HS21's compact dimensions and lightweight construction make it ideal for extended wear without fatigue. The T-shaped profile provides a stable mounting system, but users should be cautious when removing the device from its bracket to avoid potential mechanical stress. The matte black finish not only looks sleek but also provides some protection against scratches and wear. The inclusion of spare o-rings and a detailed manual further enhances the product's usability. The headlamp's ability to function without a battery when connected to a power source via USB-C adds versatility, though it limits brightness options in that mode. The overall build quality, as confirmed by multiple reviewers, reflects Sofirn's attention to detail and cost-effective manufacturing.
Performance and Output
The Sofirn HS21 delivers a versatile range of lighting modes through its combination of a Luminus SFT40 spotlight LED, six CSP1919 floodlight LEDs, and three HFL1-R red LEDs. According to the 1lumen review, the maximum output is 2200 lumens in combined mode, with a peak beam distance of 230 meters. The measured output in spot mode reaches 1,317 lumens at turn-on, while flood mode delivers 1,231 lumens. The hybrid spot+flood mode achieves 1,656 lumens, demonstrating the device's impressive versatility. However, the 1lumen reviewer noted discrepancies in the advertised floodlight output of 1,200 lumens versus the measured 1,174 lumens, with zeroair's testing showing 111 lumens, which Reddit user blaffo found surprising. The 1lumen review also reported that the floodlight mode achieves 1,231 lumens, while zeroair's measurements showed 915 lumens at turn-on, suggesting measurement inconsistencies across different testing setups.
Beam characteristics vary significantly across modes. The spotlight mode produces a narrow, intense white hotspot with a peak intensity of 13,400 candelas, while the floodlight mode creates a wide, wall-of-light beam with 1,525 candelas. The hybrid spot+flood mode combines both characteristics, offering a balanced output that is particularly useful for general tasks. The red LED mode provides 176 lumens in maximum output, suitable for night vision preservation. The 1lumen reviewer noted that the high CRI floodlight (99 Ra) produces a pure white light with minimal green tint, while the spotlight mode has a cooler white light (6000K-6500K) that can appear slightly green at the edges. The spotlight's CRI drops to 68 Ra, which is lower than the floodlight but still acceptable for most applications.
The HS21's performance is consistent across its various modes, with no PWM (pulse width modulation) used in any output setting, according to zeroair's review. This absence of PWM is particularly valuable for users who require stable lighting without flickering. The device exhibits low voltage protection in all modes, with voltage indicators showing green for 60-100% charge, red for 20-60%, and flashing red for below 20%. The runtime varies significantly with output level, with the highest modes lasting around 2-3 minutes and lower modes extending to over 250 hours. The 1lumen reviewer reported that the HS21's battery life is particularly impressive, with the lowest output mode providing over 250 hours of operation. The device's buck driver ensures stable output with minimal dimming, maintaining consistent performance even under load.
User Interface and Controls
The Sofirn HS21 features a dual-control system combining a side button for power and brightness adjustment with a rotary switch for beam type selection. The button is domed and smooth with an LED indicator underneath, allowing users to quickly identify the current power level. The rotary switch enables selection between spotlight, floodlight, spot+flood, and red light modes. According to Tim McMahon's review, the rotary switch can be adjusted while the light is on, and it remembers the last selected mode, so if a user switches to moonlight mode and then rotates to spot mode, they'll get the last brightness level selected for spot mode. This memory function enhances user convenience and reduces the need for repeated adjustments.
The infrared gesture sensor adds a unique layer of functionality, allowing users to adjust brightness by waving their hand forward or backward on the right side of the device. The sensor is highly sensitive, as noted by the BayAreaBohemian user, who warned that accidental triggering can occur with unintended hand movements. The sensor can be activated with three clicks while the headlamp is on, providing a hands-free method of control that is particularly useful for tasks requiring both hands. The device also includes a lockout mode that can be activated by loosening the tailcap, disconnecting the battery when not in use. This feature helps prevent accidental activation during transport or storage.
The HS21's interface is intuitive and user-friendly, with clear visual feedback through the LED indicators and the rotary switch's tactile response. The button's smooth dome design makes it easy to operate with gloves or in low-light conditions. The rotary switch provides a satisfying click as it moves between modes, and the memory function ensures that users don't lose their preferred settings. The gesture sensor, while convenient, requires some adjustment to avoid accidental activation. The combination of physical controls with gesture-based operation creates a versatile interface that accommodates various user preferences and conditions. The device's simplicity belies its advanced features, making it accessible to both novice and experienced users.
Battery and Charging
The Sofirn HS21 operates on a single 18650 lithium-ion battery, which is included with the device. The included battery is a 3000mAh unit, providing substantial runtime for extended use. According to zeroair's review, the device exhibits low voltage protection in every case, with voltage indicators showing green for 60-100% charge, red for 20-60%, and flashing red for below 20%. The device supports USB-C charging, which is included in the package, and can be charged while in use. The charging indicator LED provides clear feedback on the charging status, turning red during charging and green when complete. The charging process is reportedly quick and efficient, with both A-to-C and C-to-C charging working well, as noted by zeroair.
The HS21's battery life varies significantly with output level, with the highest modes lasting around 2-3 minutes and lower modes extending to over 250 hours. The 1lumen reviewer reported that the lowest output mode provides over 250 hours of operation, which is particularly impressive for an 18650-powered headlamp. The device's buck driver ensures stable output with minimal dimming, maintaining consistent performance even under load. The included 3000mAh battery provides sufficient capacity for most users, though those requiring extended use may want to consider carrying spare batteries. The hot-swappable battery system allows for easy replacement without interrupting operation, which is particularly useful for extended outdoor activities.
The device's USB-C charging capability is a significant advantage, as it allows for convenient charging using standard charging cables and power banks. The charging port features a press-in cover that is easy to remove and replace, and the device can be charged while in use. The included charging cable is a standard USB-A to USB-C configuration, which is compatible with most charging solutions. The device also supports power bank charging, making it suitable for outdoor use where access to wall outlets may be limited. The charging process is efficient and quick, with the indicator LED providing clear feedback on the charging status. The ability to charge while in use ensures that users can maintain operation during charging, which is particularly useful for extended outdoor activities.
Real-World Performance
In practical use, the Sofirn HS21 delivers consistent performance across its various modes, with users reporting reliable operation in both indoor and outdoor environments. The 1lumen reviewer noted that the HS21 is particularly effective for camping, hiking, and hands-free repair work, with the combination of high CRI floodlight, throwy SFT40 spotlight LED, and red light providing a well-rounded lighting solution. The device's versatility is evident in its ability to adapt to different lighting needs, from long-range visibility to close-up tasks. The 1lumen reviewer also highlighted the HS21's surprising lightness for an 18650 battery lamp, which contributes to its comfort during extended wear.
The HS21's performance in real-world scenarios is further supported by user feedback from the BayAreaBohemian, who uses it daily for hiking and dog training. The device's compact and comfortable design makes it ideal for extended wear, while its multiple lighting modes provide flexibility for different tasks. The gesture sensor's sensitivity is both a benefit and a potential drawback, as it allows for hands-free operation but can be accidentally triggered. The device's ability to function without a battery when connected to a power source via USB-C adds versatility, though it limits brightness options in that mode. The HS21's performance in various conditions, including low-light environments and during physical activities, demonstrates its reliability and practicality.
The device's runtime performance is particularly impressive, with the lowest output mode providing over 250 hours of operation, as reported by the 1lumen reviewer. This extended runtime makes the HS21 suitable for extended outdoor activities or situations where battery replacement may be difficult. The buck driver ensures stable output with minimal dimming, maintaining consistent performance even under load. The HS21's ability to maintain consistent performance across its various modes, combined with its low voltage protection and efficient charging system, makes it a reliable choice for users who require dependable lighting in challenging environments.
What Reviewers Loved
Multiple reviewers praised the Sofirn HS21 for its versatility, particularly the combination of high CRI floodlight, throwy SFT40 spotlight LED, and red light. The 1lumen reviewer called it 'one of the best budget headlamps' and noted that it's 'the best kept secret in headlamps on the market today.' The device's ability to provide a wide range of lighting options in a single unit is particularly appreciated by users who need flexibility for different tasks. The high CRI floodlight (99 Ra) produces a pure white light with minimal green tint, which is valuable for tasks requiring accurate color representation. The spotlight mode's peak intensity of 13,400 candelas provides excellent long-range visibility, making it suitable for outdoor activities and emergency situations.
The gesture sensor is another feature that received positive feedback, with users appreciating the hands-free operation it provides. The BayAreaBohemian user noted that the sensor is 'very sensitive' and allows for convenient brightness adjustment without physical contact. The device's ability to function without a battery when connected to a power source via USB-C is also seen as a valuable feature, though it limits brightness options in that mode. The HS21's lightweight design and comfortable headband make it ideal for extended wear, with the 1lumen reviewer noting that it's 'surprisingly light even with the buck driver.' The device's compact dimensions and overall build quality contribute to its portability and ease of use.
The HS21's battery life is particularly impressive, with the lowest output mode providing over 250 hours of operation. This extended runtime is especially valuable for users who require reliable lighting during extended outdoor activities or situations where battery replacement may be difficult. The device's buck driver ensures stable output with minimal dimming, maintaining consistent performance even under load. The inclusion of a USB-C charging port with indicator LED provides clear feedback on charging status, while the ability to charge while in use ensures that users can maintain operation during charging. The device's overall value proposition, combining advanced features with a competitive price point, has made it a popular choice among budget-conscious consumers.
Where It Falls Short
Despite its many strengths, the Sofirn HS21 has some notable drawbacks that potential buyers should consider. The primary concern raised by reviewers is the discrepancy between advertised and measured floodlight output. Zeroair's testing showed 111 lumens for flood mode, significantly lower than the advertised 150 lumens, while 1lumen's measurements were 1,174 lumens. Reddit user blaffo noted that this difference is 'a huge difference' and questioned whether it's due to measurement errors or actual performance variations. The 1lumen reviewer acknowledged that the floodlight output of 1,200 lumens is not achieved in practice, with zeroair's measurements showing 915 lumens at turn-on. This inconsistency in output measurements raises questions about the accuracy of the device's specifications.
The gesture sensor's sensitivity, while convenient, can be problematic in certain situations. The BayAreaBohemian user warned that the sensor is 'very sensitive' and can be accidentally triggered by unintended hand movements. This sensitivity can lead to unintended brightness adjustments, particularly during physical activities or when the device is worn in a position where accidental contact is likely. The device's reliance on a single 18650 battery also presents a potential risk, as battery failure or depletion can leave users without lighting. While the included 3000mAh battery provides substantial capacity, users requiring extended use may need to carry spare batteries.
The device's build quality, while generally solid, has raised concerns about potential mechanical issues. Reddit user blaffo noted that some users have complained about the bracket snapping, particularly when removing the headlamp from its mounting bracket. The plastic notch on the bracket may wear down with frequent rotation, potentially leading to mechanical failure over time. The device's T-shaped profile, while functional, may not be suitable for all users, particularly those who prefer more traditional headlamp designs. The lack of a pocket clip or magnet for attachment to clothing or gear limits its versatility in certain applications, though the headband's clip-in system provides adequate attachment for most users.
Who It's Best For
The Sofirn HS21 is best suited for users who value versatility and reliability in a budget-friendly headlamp. The device's combination of high CRI floodlight, throwy spotlight LED, and red light makes it ideal for outdoor enthusiasts, campers, and hikers who need multiple lighting options. The 1lumen reviewer noted that it's particularly effective for camping, hiking, and hands-free repair work, while the BayAreaBohemian user found it suitable for daily hiking and dog training. The device's lightweight design and comfortable headband make it suitable for extended wear, though users should be aware of the potential for bracket wear with frequent use.
Users who require a headlamp with multiple lighting modes and a gesture sensor will find the HS21 particularly appealing. The device's ability to function without a battery when connected to a power source via USB-C adds versatility, though it limits brightness options in that mode. The device's buck driver ensures stable output with minimal dimming, making it suitable for tasks requiring consistent lighting. The HS21's battery life is particularly impressive, with the lowest output mode providing over 250 hours of operation, which is valuable for extended outdoor activities or situations where battery replacement may be difficult.
The HS21 is not ideal for users who prioritize maximum brightness or require a headlamp with a more traditional design. The device's floodlight output, as measured by multiple reviewers, falls short of advertised specifications, which may be a concern for users who require precise lighting measurements. The device's T-shaped profile and lack of a pocket clip or magnet may not suit all users' preferences. Additionally, the gesture sensor's sensitivity can be problematic for users who engage in physical activities where accidental triggering is likely. The device's value proposition lies in its versatility and cost-effectiveness, making it a strong choice for budget-conscious consumers who need reliable lighting for general use.
Strengths
- +Features gesture sensor for hands-free operation
- +Provides multiple lighting modes including spot, flood, and red LEDs
- +Rechargeable 18650 battery with USB-C charging capability
- +High CRI floodlight LEDs with good color rendering
Watch-outs
- −Flood mode lumens significantly lower than advertised
- −Build quality concerns with bracket snapping reported by some users
How it compares
The Sofirn HS21 distinguishes itself with its gesture sensor for hands-free operation, a feature not found in the Nitecore NU25 400 UL or Silva Trail Runner Free H. However, it's less bright than the Fenix HM50R v2, which offers 700 lumens, and lacks the straightforward operation of the Petzl SWIFT LT.
Who this is for
At a glance: users wanting gesture control.
Why you’d buy the Sofirn HS21
- Features gesture sensor for hands-free operation.
- Provides multiple lighting modes including spot, flood, and red LEDs.
- Rechargeable 18650 battery with USB-C charging capability.
Why you’d skip it
- Flood mode lumens significantly lower than advertised.
- Build quality concerns with bracket snapping reported by some users.
Rating sources
“I really like the HS21, it is an excellent headlamp with both Red and White LEDs.”
“The Sofirn HS21 is a great for multiple situations: Spotlight: Looking at things far away with the Spotlight. Floodlight: Working on things nearby or when you need to light up a large area. Red light: Preserving night vision.”
“For that price, its a ridiculous value!”
“This all-in-one headlamp is perfect for camping, hiking, or hands-free repair work in any scenario.”
Our 4.3 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
