A good pair of headlamps gets chosen on three specific criteria, not just the lumen count printed in bold on the box: beam type, real-world runtime, and a red mode that preserves your night vision. The Petzl Actik Core stays the versatile reference, the Nitecore NU20 targets featherweight use, and the Black Diamond Spot 400 banks on a longer beam throw for spotting what’s ahead.
- Lumen count doesn’t tell the whole story: 400 lumens in a wide beam and 400 lumens in a focused beam light up completely different things
- Red mode isn’t a gimmick: white light wrecks your night vision for several minutes, red preserves it
- Rechargeable and battery-powered each have their place: USB for daily use, standard batteries so you’re never stuck far from an outlet
Contents
- Headlamps, the comparison at a glance
- How many lumens you actually need
- Wide or focused beam, what changes in practice
- The Petzl Actik Core, the versatile reference
- The Nitecore NU20, the featherweight
- The Black Diamond Spot 400, the reassuring reach
- Red light, why it matters this much
- Rechargeable or battery-powered, the tradeoff to settle
- Questions we get asked a lot
- Our take based on your use case
Headlamps, the comparison at a glance
| Model | Output | Power | Who it’s for |
|---|---|---|---|
| Petzl Actik Core | Up to 350 lumens | CORE battery + AAA | Versatile use, hiking and camp |
| Nitecore NU20 | 360 lumens | USB-C rechargeable | Featherweight, trail and fastpacking |
| Black Diamond Spot 400 | 400 lumens | 3 AAA included | Long throw, rough terrain |
How many lumens you actually need
For walking a marked trail or setting up camp, 200 to 400 lumens comfortably covers real needs. Chasing a higher number without thinking about beam type stays a common mistake: a 2000-lumen light in a focused beam lights up what’s far ahead but leaves your feet and camp in the dark, while a 400-lumen wide beam lights up your entire close field of view.
The real criterion stays intended use, not the number on the box: reading and camp chores call for a wide beam, spotting things at a distance calls for a focused one.
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Wide or focused beam, what changes in practice
A wide (flood) beam spreads light over an open angle, ideal for reading, cooking, or pitching a tent without constantly moving your head. A focused (spot) beam throws light far ahead in a narrower point, useful for spotting a trail marker at distance or sizing up terrain before committing to it.
Most modern headlamps, including all three models in this comparison, offer both settings on the same unit, avoiding the need to pick just one for every situation.
The Petzl Actik Core, the versatile reference
The Petzl Actik Core combines adjustable wide and focused beams, a red mode to preserve night vision, and a CORE battery rechargeable via USB while staying compatible with standard AAA batteries as backup. That dual power system stays its main strength: never stuck without light, whether at home or deep in the backcountry.
Its weight of around 80 g and adjustable headband keep it comfortable for a full evening around camp, without the heavy feeling that tires the forehead on bulkier models.
The Nitecore NU20, the featherweight
The Nitecore NU20 weighs barely 38 g, rechargeable directly via USB-C with no proprietary cable, for a peak output of 360 lumens. This ultralight format mainly targets trail running and fastpacking, where every gram counts on an already-stripped-down pack.
This compact format does trade off runtime at maximum brightness, a logical compromise for this level of lightness.
The Black Diamond Spot 400, the reassuring reach
The Black Diamond Spot 400 throws a beam capable of reaching up to 100 meters, a genuine advantage on rough terrain where spotting the trail at a distance changes everything. It runs on 3 included AAA batteries, with an optional Black Diamond 1500 rechargeable battery sold separately for anyone who prefers USB day to day.
Its dedicated red night-vision mode and decent water resistance make it a solid pick for camp as much as for night hiking.
Red light, why it matters this much
Your eyes shift from cones (active in bright light) to rods (active in the dark) as night falls, a process that takes 30 to 45 minutes to reach full effectiveness. A single second of direct white light is enough to undo that adaptation and send you back to square one.
The rods in your eyes barely detect red at all, which lets you light your way without losing dark adaptation already gained. Switching to red mode as soon as night sets in, rather than reaching for white out of habit, changes a lot about how well you can see without a light the moment after.
Rechargeable or battery-powered, the tradeoff to settle
A USB-rechargeable battery stays economical and convenient for regular use near a power source, but leaves you without light if it dies mid-outing with no way to recharge. Standard AAA batteries, findable in any small town, stay the safer choice for a long trip fully off-grid.
A hybrid model like the Petzl Actik Core, which accepts both, avoids having to commit permanently to one logic or the other.
Questions we get asked a lot
How long does a charge last in real use?
It depends heavily on the mode: at full power on a wide beam, expect a few hours; on economy or red mode, several dozen hours become possible.
Is a headlamp enough for night hiking?
Yes for the trail itself, but walking technique and how your eyes adapt matter just as much as the light itself.
Do you need a fully waterproof headlamp for regular hiking?
Basic rain resistance (IPX4) covers most land use; full waterproofing only becomes useful for kayaking or prolonged driving rain.
Our take based on your use case
| Versatile use, hiking and camp | Petzl Actik Core, the dual power system that never leaves you stranded |
| Featherweight, trail and fastpacking | Nitecore NU20, 38 g barely felt on the forehead |
| Long throw, rough terrain | Black Diamond Spot 400, a beam that reaches up to 100 meters |
Once your headlamp is picked, our guide to night hiking covers the technique that rounds out the gear, from how your eyes adapt to the pace to keep once the trail disappears into the dark. Keeping a headlamp within reach also rounds out our 72-hour survival kit, and if the trail vanishes anyway, our guide to the STOP method covers what comes next. A dedicated hiking GPS stays the logical complement, so you’re never relying on light alone to find your way.
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