Petzl vs Black Diamond

These are the two headlamp brands most buyers end up choosing between, and they are genuinely hard to separate in a shop. Both have decades of reputation among climbers and hikers, both sit at similar prices, and both make lamps people keep for years. On published specifications they are not close at all.

Across the lamps we cover, Petzl publishes output, beam distance, runtime, battery energy in watt-hours, weight and an ingress rating on every single model. Black Diamond publishes output. That is the comparison, and the rest of this page is what it means once you are actually deciding.

How we picked

Three matched pairs at the three prices people actually shop — the budget AAA lamp, the mid-range rechargeable, and the feature flagship — plus Petzl's ultralight and emergency outliers, which Black Diamond fields no equivalent to in our set. Every figure is the maker's own, linked with the date we read it. Black Diamond's own site would not serve us a spec page from this build, so its figures are cited to the brand's own retail listing and labeled as such.

We have handled none of these lamps and do not claim to have. Our methodology sets out what we do instead, and why we think published arithmetic beats another set of unverifiable impressions.

What each brand will tell you before you buy

Six Petzl lamps publish a beam distance. Zero Black Diamond lamps do. Petzl states battery energy in watt-hours directly, which no other brand on this site does — not Fenix, not Nitecore, nobody. It is the single strongest piece of disclosure in the category.

What the beam figures actually say

Beam distance converts exactly to candela, so Petzl's published distances let us compute how concentrated each beam is. Divide by output and you get the number that tells you what a lamp is for.

Where Black Diamond genuinely wins

A disclosure ranking is not a quality ranking, and it would be lazy to leave it there. Black Diamond fields two features no Petzl lamp in our set matches, and for some buyers they decide the purchase outright.

• Red, green and blue night vision on the Storm 500-R. Green preserves dark adaptation the way red does, but renders map contours and blood trails differently — which is why hunters ask for it by name. No Petzl lamp we cover offers all three.
• Brightness memory on the Spot 400-R. The lamp returns to the level you switched off at, so red is one click away instead of a cycle through full white. In a shared tent at 2 a.m. that is the difference between a lamp people tolerate and one they resent.
• Dual-fuel on the Cosmo 350. Three AAA cells or Black Diamond's rechargeable pack in the same body. Petzl answers this with its own hybrid concept on the Tikka and Tikkina, so it is a draw rather than a win — but it is a real feature at the bottom of the range.

Petzl answers with reactive lighting, which is its own genuine differentiator: the Swift RL and NAO RL read the light in front of you and dim automatically, which is why Petzl can publish a 7-hour minimum at medium and mean it. Whether that is worth more than a green LED depends entirely on whether you are running at night or sitting in a hide.

The three matched pairs

Budget AAA: Petzl Tikka vs Black Diamond Cosmo 350

The closest pair on the page and the one most people are actually choosing between. Both publish 350 lumens and both sit within a couple of dollars of each other. The Tikka adds 70 m of published beam distance, a 94 g weight and IPX4; the Cosmo publishes none of those. Both run on three AAA cells with a rechargeable upgrade path.

At identical output and near-identical price, the tiebreak is what you know before you buy — and that is entirely one-sided. Take the Cosmo only if you specifically want Black Diamond's red mode implementation. Skip the Tikka if you want a rechargeable pack in the box; the CORE is an extra purchase.

Mid rechargeable: Petzl Actik Core vs Black Diamond Spot 400-R

The Actik Core publishes 625 lumens, 115 m, 4.5 Wh, 88 g and IPX4, and ships with its rechargeable pack while still accepting AAA cells. The Spot 400-R publishes 400 lumens and an integrated rechargeable battery. On the figures this is not a contest.

But the Spot is the cheaper lamp, and brightness memory is a real ergonomic advantage. Skip the Actik Core if the price gap matters more to you than knowing the numbers — it is meaningfully more expensive for output you may never use. Skip the Spot if you want to plan a night around a runtime figure, because there is not one.

Flagship: Petzl Swift RL vs Black Diamond Storm 500-R

The Swift RL publishes 1,200 lumens, 168 m, 8.47 Wh and 92 g — more than double the Storm's output at a weight Black Diamond does not disclose — plus reactive dimming that genuinely extends the burn rather than just claiming to. The Storm answers with the three-color night-vision set and a reputation as the waterproof one in the range, though no ingress rating appears in the listing we read.

Skip the Swift RL if you need immersion-rated waterproofing, since IPX4 covers rain and not submersion. Skip the Storm if output or documented runtime is the deciding factor. Worth knowing: the Swift RL's buy box is currently showing no live price through our data layer, so its button reads Check price rather than a figure — the listing is live, we simply will not print a number the layer has not verified.

Two Petzl lamps with no Black Diamond answer

The Swift LT publishes 43 g, which is the lightest figure on this entire site, along with 380 lumens, 70 m and 3.27 Wh. For ultralight backpacking, where grams are argued over seriously, nothing in Black Diamond's range that we cover publishes a weight at all — so it cannot even enter the argument. The cons are real: 380 lumens is modest and IPX4 means rain only.

The e+LITE is 30 lumens and lives in a first-aid kit for years. It is not a lamp you use; it is a lamp you find. Skip it as your only headlamp — 30 lumens will not get you off a mountain — and see emergency and home lighting for how that fits a wider kit.

Which brand should you buy

• You want to know what you are getting — Petzl, on every lamp, without qualification.
• You need red, green and blue night vision — Black Diamond Storm 500-R. Nothing from Petzl matches it. See red light mode.
• You are counting grams — Petzl Swift LT at 43 g. Black Diamond publishes no weights.
• You want the cheapest lamp worth owning — Petzl Tikkina, or the Cosmo 350 if you prefer BD's red mode. See headlamps under $50.
• You are running at night — Petzl Swift RL or NAO RL, on reactive lighting and published watt-hours. See headlamps for running.
• You want the brand ranking across all ten makers we cover — headlamp brands, ranked on what they publish.

What we would not tell you

We would not tell you Black Diamond makes worse headlamps. We have used neither brand and cannot say. Black Diamond has an extremely strong reputation among climbers, its lamps are in more gear closets than almost anything else, and nothing on this page contradicts that. What we can say is that if a Petzl lamp underperforms its published figures you have a documented claim to hold it to, and with Black Diamond you have a lumen number.

We would also not fill in the empty cells in that first table. Estimating a runtime or assuming an IP rating would make this page look more useful and would be exactly the thing this site exists not to do.