3,150 Real Lumens. 62‑Gram Lamp Head.

Yes — and the weight is exactly the point. The 62 grams is the entire electronics package: aluminum housing, four Cree LEDs, four-lens optical system, PCB, and the IP67-rated USB-C port. The reason it's that light is that we moved the heavy part — the battery — off the head and into a separate 190-gram pack you keep in your pocket, your vest, or on your headband.

For an eight-hour ski tour, that means no neck fatigue, no headache after the descent, and a lamp that still delivers 3,150 real lumens when you point it at the trail.

Yes — that's one of the reasons the battery is external. With a 62-gram lamp head and the 190-gram pack worn on the headband at the back of the head, in a vest pocket, or — with the 1.5 m cable — in a jacket pocket or backpack, weight distribution stays low and centered. There's nothing heavy bouncing on the front of your head on rough descents or technical sections.

The click-release on both ends of the command cable means you can swap mounting positions in seconds without tools. With the standard 40 cm cable, the pack sits on the headband. Swap to the 1.5 m cable and the pack moves into a jacket pocket when it gets cold, or onto a hip belt when you want zero head weight.

Wide, even flood — not a tunnel-vision spot. Four lenses at 15°, 20°, 25° and 30° are layered into one field that widens progressively as it comes back towards you, with no hot centre and no dead zones at the edges of your peripheral vision.

This is deliberate. For ski touring, MTB, and orienteering, you need to read terrain at the edges of your field of view, not just what's directly in front of you. A spot beam at 3,150 lumens would be blinding in the centre and useless to the sides. The four-lens approach gives you the same total output spread across a beam shape that matches how your eyes actually scan terrain in motion.

Operating range is −25°C to +60°C. The aluminum housing handles cold without issue — the question is the battery.

Lithium cells lose capacity below roughly −10°C, which is true of every battery on the market. The difference with the SPORT 3100 is that the battery pack is external. In deep cold you keep the pack inside your jacket, where your body heat keeps the cells warm and the lumens where they should be. The standard 40 cm command cable reaches comfortably from inner pocket to lamp head; the 1.5 m extension cable is available separately for layered winter clothing where you want the pack deeper in.

This is the practical reason the lamp head and battery are separate. It's not a design choice — it's how a high-output headlamp works honestly in real winter conditions.

Same hardware platform, same optics, same battery, same runtime — and the same 2-year international warranty. The difference is the channel: SPORT is sold as a consumer product, PRO with fleet pricing and dealer support. Both use the black headband with white Stormlight branding.

Pick SPORT for personal sport, recreation, racing, and adventure. Pick PRO if the lamp is a tool you depend on for paid work.

The biggest difference is what the lumen number actually means. Most flagship headlamps at this price point are rated to ANSI/PLATO FL1 — the headlamp industry's measurement standard. FL1 measures output between 30 seconds and 2 minutes after activation, and defines runtime as the time until output drops to 10% of that initial reading.

That sounds reasonable until you understand what it allows. A high-output LED hasn't yet thermally throttled at the 30-second mark — it's still drawing peak current before the heat catches up. So a lamp can claim 3,500 lumens and a 4-hour runtime, while in practice it delivers 3,500 lumens for the first few minutes, drops to 30–50% within the first half hour, and spends most of the rated runtime delivering a fraction of the headline number. Technically compliant. Practically misleading.

We don't measure that way. Our 3,150 lumens is the output the lamp delivers at operating temperature — once the LEDs have stabilized and thermal management is in steady state — and it's the output we sustain across the rated 1h 30min runtime on full power. Same for every other mode. The number you read on the box is the number that hits the trail, not a peak you'll only see for the first few seconds.

The other concrete differences:

Repairability. Every part is user-replaceable — the cable, the battery pack, the LED, the optics, the headband. No soldering, no proprietary screws, no service centre. Ten-year part availability on every model we ship.

External battery on a clean platform. Click-release on both ends, GoPro-compatible feet, command cable as a separate user-replaceable part. The lamp grows with your gear instead of being locked to one configuration.

You can find lamps with bigger headline numbers for less money. We don't compete on that. We compete on what those numbers actually deliver in your hand at −15°C three hours into a tour.

Material and manufacturing defects under normal use, anywhere in the world. If something fails because of how it was made or what it was made of, we replace or repair it — one form, one conversation, one shipment.

The warranty doesn't cover physical damage from drops, crashes, or impact, or wear on consumable parts like the headband. For those, we offer the Repair Service: every part is replaceable, often for less than the cost of a new lamp.

Read the full warranty →

Email us with what's wrong. We send you the replacement part with simple instructions. Most repairs are user-completable in under five minutes — click-release means no tools.

If the failure is something you don't want to handle yourself, you ship the lamp to us and we handle it. No service-centre network, no authorised repair shops. One channel, direct.

Parts are guaranteed available for ten years from the model's launch. More about repair →

Yes. The lamp head has GoPro-compatible feet built in, so any standard GoPro mount — helmet adapter, handlebar mount, chest rig — works out of the box.

For mounting on our own click-release system, we use a four-tab connection (the GoPro standard uses two prongs). Both work. The four-tab keeps holding the day one tab breaks, which is the practical reason we engineered it that way.

Helmet brackets, handlebar adapters, and additional accessories are coming this autumn.

Yes, in carry-on. The 6,000 mAh / 7.4V pack works out to 44.4 Wh, well under the 100 Wh limit for lithium-ion batteries in cabin baggage on every major airline. Always pack it in your carry-on, never in checked luggage — that's the rule for any lithium battery, not specific to ours.

Worldwide air shipping from Hong Kong, 2–7 days to most destinations. All duties and import taxes are included in the price you see at checkout — nothing extra to pay on delivery.

14-day return window from the day the lamp arrives. If something's wrong or it's not what you expected, ship it back and we refund in full.