725 Lumens. 90 Grams. One Cell.

For most trail running, yes — including ultras. The lumen number on the box is rarely where the lamp actually runs. iRunFar's testing and Petzl's own data on UTMB athletes show that ultra runners spend the majority of any night effort at 100–300 lumens. That's modes 3 (180 lm) and 4 (60 lm) on the SPORT 700.

The 725 lumen mode is there for the technical descent, the unexpected switchback, the moment you need to read the trail like daylight. You don't run at full output the whole time — on any lamp, that's a runtime problem, not a feature. The honest question isn't "is 725 enough", it's "how often will I need more than 725", and for most trail and ultra running the answer is "rarely, and not for long".

If you do most of your training in the dark half the year, or you race technical mountain terrain often, the SPORT 1200 gives you a charged spare in the pocket and twice the peak when you need it. Either lamp is honest about what it does.

Honest answer: it depends on how often you'll be running out of battery in the field. The 500 kr difference between SPORT 700 and SPORT 1200 buys you one extra 18500 cell in the box, and a higher peak output (1,225 vs 725 lm). Same housing, same band, same red LED, same charging.

Pick SPORT 1200 if: you do a lot of long efforts where charging isn't an option, you race or train through Nordic winters with limited daylight, you want twice the peak output for technical descents.

Pick SPORT 700 if: most of your sessions are 1–3 hours, you can charge between outings, 725 lumens covers what you actually need, and you'd rather put the 500 kr toward a spare 18500 cell when (and if) you need one.

You don't outgrow the SPORT 700. A spare 18500 doubles every runtime number with a 10-second swap, no tools.

Operating range is −25°C to +60°C. The aluminum heat sink handles cold without issue. Lithium cells lose capacity below roughly −10°C — that's true of every battery on the market — and with the cell on the lamp head, it's exposed to ambient temperature.

The straightforward fix in deep cold is a spare 18500 in your inner pocket. Swap to the warm cell when the running cell starts to weaken; the cycle continues — running cell on the head, warm spare in your pocket. For sustained operation in extreme cold, the SPORT 3100 is designed differently: external battery pack on a cable, kept inside your jacket. Different lamp for a different problem.

The SPORT 700's headband sits closer to your brow than the PRO 700's click-release version. The lamp doesn't lift off the band — that's the trade. What you get is a lower profile, less bounce on technical descents, and a centre of mass that stays put during fast movement.

The lamp head itself still has the GoPro-compatible feet, so it mounts on any GoPro accessory — helmet bracket, chest rig, bar mount. What you give up is tool-free release from the band itself. What you gain is a band built specifically to run.

Same hardware platform, same 725 lumen output, same six white modes, same red circuit, same battery, same charging, same multi-charger compatibility. The differences are the headband and the warranty framework. SPORT comes with the fixed low-profile headband (black with yellow Stormlight branding) and a 2-year international consumer warranty. PRO uses the click-release headband with white branding and operates under a separate warranty structure for professional and commercial use.

Pick SPORT for personal sport, recreation, 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 lamps in this category 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 be marketed at one number while in practice it stabilizes at a much lower output within the first few minutes and runs at that level for most of the rated runtime. We've seen significant drops between the headline figure and what the lamp actually delivers once it's warmed up. Technically FL1-compliant. Practically misleading.

We measure differently. Our 725 lumens is the output the lamp delivers at operating temperature — once the LEDs have stabilized and the aluminum heat sink is doing its job — and it's the output we sustain across the rated runtime. Same for every other mode. The number you read on the box is the number that hits the trail.

The other concrete differences:

Aluminum heat sink at the rear. This is what lets the lamp hold its rated output. A polymer front for impact resistance, aluminum at the rear pulling heat away from the LEDs. The lamp is built to deliver the lumens it claims for the duration it claims them.

Standard 18500 cell, not a sealed pack. The SPORT 700 runs on an 18500 Li-Ion cell — the same cell as the SPORT 1200 and PRO 1200, available as a spare. Many lamps in this price band use proprietary integrated battery packs that you can't replace and can't carry a spare for. When that pack fails, the lamp is finished.

Repairability. Every part is user-replaceable — the battery, the lens, the switch, the circuit board, the headband. No soldering, no proprietary screws, no service centre. Ten-year part availability on every model we ship.

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 hour three of a long effort, in the rain, when the cell is half-spent.

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 — no tools required for the cell, the headband, or the mount feet.

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, even though the headband itself is fixed.

For mounting on Stormlight's own click-release accessories, our spring-loaded receivers grip the same GoPro-compatible feet and won't release on impact or vibration. Same feet on the lamp, better receivers on the accessories.

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

Yes, in carry-on. The 18500 cell is roughly 2,600 mAh at 3.7V — about 9.6 Wh. Well under the 100 Wh limit for lithium-ion batteries in cabin baggage on every major airline. Always pack lithium batteries in your carry-on, never in checked luggage — that's the rule for any lithium battery, not specific to ours.

Worldwide air shipping, 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.