Sofirn HS41 Headlamp – 4000lm, 4×SST20, 9 Modes, IP68, USB-C Rechargeable, Magnetic Tail (5000K or 6500K)

4000 Lumens. 325 Meters. One Headlamp.

The Sofirn HS41 is a high-output headlamp built for serious outdoor use — hiking, camping, trail running, work sites, and emergency preparedness. Four SST20 LEDs pump out up to 4000 lumens with a 325-meter beam distance, switchable between a tight 25° spotlight and a wide 96° floodlight. Nine modes cover every scenario from sub-lumen moonlight (runs 29.5 days) to turbo, strobe, SOS, and beacon. The headlamp is detachable and doubles as a handheld flashlight. USB-C rechargeable 21700 battery included. Choose 5000K (neutral white) or 6500K (cool white).

Key Features

• 4000 lumens / 325m beam – 4× SST20 LEDs deliver exceptional throw and flood for a headlamp at this size and weight
• Dual beam: spotlight + floodlight – 25° tight spotlight for distance; 96° wide floodlight for close-range and peripheral work
• 9 lighting modes – Moonlight / Eco / Low / Medium / High / Turbo / Strobe / SOS / Beacon; single-press mode switching
• 29.5-day runtime in moonlight mode – 21700 5000mAh battery delivers extraordinary runtime at low output; great for extended trips and emergency kits
• IP68 waterproof + 1-meter impact resistant – A6061-T6 aluminum alloy body with toughened glass lens; built for rain, mud, and drops
• Magnetic tail cap – mounts to metal surfaces hands-free for a lantern or work light
• Detachable headlamp module – use as a headlamp on the band or remove and use as a compact handheld flashlight
• USB-C rechargeable – charges via standard USB-C; 21700 battery included
• Lightweight headband – 79g (battery excluded) for all-day or all-night comfort
• Color temperature – choose 5000K (neutral white, 4700–5300K) or 6500K (cool white, 6000–6500K)

Battery Level Indicator

• Green – Good (70–100%)
• Red – Low (30–69%)
• Flashing Red – Critical (<30%) — recharge or replace battery soon

First use: unscrew the tail cap and remove the insulating paper. When replacing the battery, ensure the positive end faces the head.

Specifications

• Brand: Sofirn
• Model: HS41
• LEDs: 4× SST20
• Max output: 4000 lumens
• Beam distance: 325m
• Beam angles: Spotlight 25° / Floodlight 96°
• Modes: 9 (Moonlight / Eco / Low / Medium / High / Turbo / Strobe / SOS / Beacon)
• Battery: 1× 21700 5000mAh (included), USB-C rechargeable
• Operating voltage: 2.7V–4.2V
• Body material: A6061-T6 aluminum alloy
• Lens: Toughened glass
• Size: 1×29×115mm
• Weight: 79g (battery excluded)
• Waterproof: IP68
• Impact resistant: 1 meter
• Color options: 5000K / 6500K