The verdict: Buy it if comfort over many hours matters more to you than maximum brightness, and you want a constant output mode that will not dim itself while you are picking a line. Skip it if you need a properly waterproof lamp, because IPX4 handles rain and not much more, or if you want the longest beam distance available.
BioLite HeadLamp 800 Pro USB Rechargeable Headlamp, 8 Modes, Grey
~$150
An 800 lumen rechargeable headlamp with the electronics integrated into a 3D SlimFit moisture-wicking band, eight modes and a constant no-dim mode.
Check price on AmazonSpecifications
| Maximum output | 800 lumens |
|---|---|
| Runtime | 150 hours on low, 7 hours on high, 8 hours on reserve |
| Modes | 8 |
| Construction | 3D SlimFit band with the electronics integrated for a no-slip, no-bounce fit |
| Constant mode | Full illumination with no auto-dimming |
| Boost | A push on the rear gives 30 seconds of maximum brightness |
| Charging | Integrated USB port, plus a Run Forever cord for use with a power bank |
| Water rating | IPX4 |
| Approx. price | Around $150 |
Specifications above come from BioLite's published specifications for the HeadLamp 800 Pro. Treat pricing as approximate, since Amazon pricing moves.
What it does well
- The integrated-band construction is the most comfortable design in the category. Nothing bounces because nothing hangs off the band.
- A hundred and fifty hours on low is a genuinely different order of runtime, and low output is what you use for most of a night on runnable ground.
- Constant mode is a real feature and an increasingly rare one. When you have chosen a brightness, the lamp holds it and does not decide otherwise.
- The Run Forever cord lets you run indefinitely from a power bank in a vest pocket, which removes the battery question entirely on a multi-day.
- Moisture-wicking fabric matters more than it sounds. A lamp band that soaks and sags is a lamp that slides all night.
Where it falls short
- IPX4 means splash resistant, not waterproof. Sustained heavy rain, which is normal in mountain racing, is beyond what that rating promises.
- Eight hundred lumens is plenty for most trail running and it is less beam distance than the brightest lamps, so very fast technical descending is not its strongest use.
- Seven hours on high does not cover a full winter night at maximum, so you will be managing brightness or carrying a power bank.
- The band is the lamp. If the fabric wears out or the elastic goes, you are not replacing a headband, you are replacing the unit.
- It uses a micro USB cable in the box rather than USB-C, which is one more cable type to remember in 2026.
- It is a rechargeable-only design. There is no option to drop in a set of AAA cells at a drop bag, which is the main practical advantage of hybrid lamps.
What owners report
The dominant theme across published owner reviews is comfort, and it is stated more emphatically than for any other lamp in this class. Runners repeatedly describe forgetting they are wearing it, which is the thing you want after six hours. Runtime on low draws consistent praise and appears to match the specification closely.
The complaints are specific and repeated. Water resistance comes up from people who ran it in genuine downpours. Several owners note that the band absorbs sweat and needs washing to stay comfortable. And a smaller group wanted more beam throw for technical descents, which is a fair criticism of an 800 lumen lamp being asked to do a 1500 lumen job.
Where it fits with the rest of your kit
The decision that saves the most trouble on a hundred miler is not brightness, it is power source, and rechargeable vs battery headlamp covers it properly. This lamp is firmly on the rechargeable side, which means a drop bag plan rather than a spare battery. Headlamp vs waist light covers the other useful decision, and the field is compared in best headlamps for ultrarunning. The Petzl NAO RL is the brighter, more technical alternative and the Ledlenser NEO9R sits between them. Work out how many hours of dark you are actually facing with the splits calculator, then stage your spare light with the drop bag planner.
Who it suits
- Runners who will be in the dark for many hours and care about comfort above all.
- Anyone who finds reactive dimming distracting and wants a lamp that stays where it is set.
- Multi-day and fastpacking users, because of the Run Forever power bank cord.
- People with a history of headlamps bouncing loose on descents.
Who should skip it
- Runners racing in sustained heavy rain, where IPX4 is not enough assurance.
- Fast technical descenders who want maximum beam distance.
- Anyone who wants the option of dropping in AAA cells mid-race.
Alternatives worth considering
Petzl NAO RL Rechargeable Headlamp, 1500 Lumens
~$128
Around $22 less for nearly double the output and a 200 metre beam, with reactive dimming and a rear battery that also charges other devices. Heavier and less comfortable, and the auto-dimming will annoy some people. The lamp for technical night descents.
Check price on AmazonPetzl ACTIK CORE Headlamp, 650 Lumens
~$85
Around $65 less, at 650 lumens, and it takes either the rechargeable CORE battery or three AAA cells. That hybrid ability is the most useful feature in the category for a hundred miler, because a fresh set of cells at an aid station takes ten seconds.
Check price on AmazonBioLite Dash 450 Running Headlamp, 450 Lumens
~$70
Around $80 less from the same brand, with the same integrated-band comfort at 450 lumens. Plenty of light for road, gravel and non-technical trail. If your night running is an hour before dawn rather than a full night, this is the sensible spend.
Check price on AmazonCommon questions
Is the BioLite HeadLamp 800 Pro waterproof?
No. It is rated IPX4, which means resistance to splashing water from any direction. That covers rain, sweat and a stream crossing splash. It does not promise performance in sustained heavy rain over hours, and it is not rated for immersion. If your racing regularly involves genuine downpours, look for a higher IP rating and treat this as a fair weather and light rain lamp.
How long does the BioLite 800 Pro last on a charge?
BioLite quotes 150 hours on low, 7 hours on high and 8 hours on reserve. Most trail running at night happens well below the high setting, so realistic runtimes fall between those extremes and are generous. For a full winter night at higher output, use the Run Forever cord with a power bank in a vest pocket, which removes the limit entirely.
BioLite 800 Pro vs Petzl NAO RL: which is better for running?
The BioLite is more comfortable and has a constant mode that never dims itself. The Petzl is brighter at 1500 lumens with a 200 metre beam, adds reactive dimming and carries a rear battery that can charge a phone. For long hours of steady running, the BioLite. For technical terrain where you are descending fast in the dark, the Petzl.
Can you replace the battery in a BioLite headlamp?
Not in the field. The 800 Pro is a rechargeable unit with the battery integrated into the band construction, which is what makes it so comfortable and also what removes the option of swapping cells at an aid station. The Run Forever cord lets you power it from an external battery pack while running, which is the practical workaround. If you want swappable cells, look at a hybrid lamp such as the Petzl ACTIK CORE.
What headlamp brightness do I need for a 100 miler?
Less than the marketing suggests, most of the time. Two hundred to four hundred lumens covers steady running on most trails, with brighter bursts for descents and junctions. What actually decides a hundred miler is runtime and the plan behind it: a lamp you can run all night at your normal setting, plus either a spare lamp or a spare battery staged at the right drop bag. Most hundred milers require a backup light anyway.
Keep reading
- Rechargeable vs battery headlamp
- Headlamp vs waist light
- Petzl NAO RL review
- Best headlamps for ultrarunning
- Drop bag planner
This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.