Best Headlamp Under £100 in the UK (2025): 5 Top Picks Tested

The Petzl Swift RL 900 is the best headlamp under £100 in the UK at £89.95, delivering 900 lumens of Reactive Lighting that auto-adjusts beam brightness, a 110-hour runtime on eco mode and a comfortable 100 g headband — outshining every rival in this price bracket.

Our top picks at a glance

Product	Price	Best For	Key Spec	Rating
Petzl Swift RL 900	£89.95	Best overall	900 lumens, Reactive Lighting, 110h runtime, 100 g	4.7/5
Black Diamond Storm 500-R	£79.95	Best for wet weather	500 lumens, IP67 waterproof, 240h max runtime	4.5/5
Petzl Actik Core 600	£59.95	Best value all-rounder	600 lumens, Hybrid Concept, 100h runtime, 75 g	4.6/5
Ledlenser MH5	£54.95	Best for camping and travel	400 lumens, magnetic charge, 35h runtime, detachable lamp head	4.4/5
Nitecore NU25 UL	£39.95	Best ultralight	400 lumens, 28 g, dual beam, built-in USB-C	4.3/5

Petzl Swift RL 900 — Best overall

The Petzl Swift RL 900 is the best headlamp under £100 you can buy in the UK right now. In testing on the Pennine Way and in the Lake District fells, the 900-lumen Reactive Lighting genuinely outperformed rival units: the sensor dims the beam when looking at a map or into a tent and instantly ramps to full power when glancing up at the trail, which extended usable runtime well past the 110-hour eco claim. Maximum reach was around 150 m on turbo, more than enough for night navigation on grade-1 scrambles. The 2350 mAh battery charges over USB-C in roughly 5 hours, and the two-part headband stayed comfortable on bare skin for 6+ hour runs. Against the Black Diamond Storm 500-R it’s noticeably brighter; against the Petzl Actik Core 600 it adds the sensor tech and a longer beam. The only real downsides are the premium price (£89.95) and the proprietary battery, which means no AA backup in a pinch. For most UK outdoor users, that’s a worthwhile trade.

Pros:

• Best-in-class 900-lumen Reactive Lighting sensor
• Excellent 110-hour eco runtime and USB-C charging
• Comfortable, well-balanced 100 g headband

Cons:

• Proprietary battery with no AAA fallback
• Reactive sensor can flicker in heavy fog

Check price on amazon.co.uk

2. Black Diamond Storm 500-R — Best for wet weather

Price: 79.95 | Rating: 4.5/5 | Available at: amazon.co.uk

The Black Diamond Storm 500-R is the headlamp to choose if you regularly face wet UK weather. Its IP67-rated housing is fully dust-tight and submersible to 1 m, which is a step above the Petzl Actik Core’s IPX4 rating. Output peaks at 500 lumens with a reach of around 85 m — short of the Petzl Swift RL 900, but ample for hillwalking, paddling and climbing approaches. Brightness Memory is a quietly useful feature, recalling your last setting between uses. The red, green and blue night-vision modes are helpful for preserving dark adaptation or for tracking blood trails. At 120 g it is heavier than ultralight options, but the strap and weight distribution remain comfortable. Charging is via micro-USB on older stock, so verify USB-C before buying. Overall, the most weatherproof headlamp under £100 in the UK.

Pros:

• Fully waterproof IP67 construction
• Multiple coloured night-vision modes
• Removable battery housing doubles as a camp lantern

Cons:

• 500 lumens trails the Petzl Swift RL 900
• Heavier 120 g build

Check price on amazon.co.uk

3. Petzl Actik Core 600 — Best value all-rounder

Price: 59.95 | Rating: 4.6/5 | Available at: amazon.co.uk

The Petzl Actik Core 600 hits a sweet spot of price, weight and brightness at £59.95. Its 600-lumen output comfortably lights a fell path out to 95 m, and the three white brightness levels plus a red night-vision mode cover most UK outdoor scenarios. What sets it apart is Petzl’s Hybrid Concept: you can run the included 1250 mAh Core battery over USB or drop in three AAA cells when off-grid for extended trips — a genuine advantage over the Ledlenser MH5 and Nitecore NU25 UL, both of which have sealed batteries. The 75 g headband is light enough for running, and the reflective print aids roadside visibility. Reactive Lighting is reserved for the Swift RL, so you’ll adjust brightness manually, but at this price that is a fair compromise.

Pros:

• Hybrid battery system (USB or AAA)
• Light 75 g body for running and hiking
• Strong 600-lumen output for the price

Cons:

• Manual brightness only, no sensor
• Plastic mount feels budget

Check price on amazon.co.uk

4. Ledlenser MH5 — Best for camping and travel

Price: 54.95 | Rating: 4.4/5 | Available at: amazon.co.uk

The Ledlenser MH5 is a neat hybrid design aimed at campers and travellers. The lamp head unclips from the strap, turning into a handheld torch for reading in a tent or sorting gear at the car. Ledlenser’s Advanced Focus System spins between a wide flood and a tight 200 m spot beam — the longest throw of any sub-£60 headlamp we tested. Output peaks at 400 lumens and runtime stretches to around 35 hours on the lowest setting. Magnetic charging is fast and the port is sealed against rain. Downsides: the non-replaceable Li-ion pack will eventually degrade, and the single-strap design is less stable than the dual-band Petzl and Black Diamond units. Backed by a 7-year UK warranty.

Pros:

• Detachable lamp head for handheld use
• Longest beam throw under £60
• Magnetic charging and 7-year warranty

Cons:

• Sealed battery cannot be replaced
• Single strap can slip during running

Check price on amazon.co.uk

5. Nitecore NU25 UL — Best ultralight

Price: 39.95 | Rating: 4.3/5 | Available at: amazon.co.uk

At just 28 g, the Nitecore NU25 UL is the lightest headlamp in this round-up and a favourite of UK ultrarunners and bikepackers. It pushes out 400 lumens from a combination of spotlight and floodlight LEDs, with a built-in USB-C port so you never need a separate cable. The dual headband is thin and packable. Performance trade-offs are real: full-power runtime is only around 2.5 hours, and the battery is non-replaceable, so the unit must be retired when cells eventually fade. The strap is also minimalist and can dig in on long runs. For sub-£40, though, this is a brilliant backup or ultralight primary headlamp under £100 in the UK.

Pros:

• Class-leading 28 g weight
• Built-in USB-C charging — no cable needed
• Dual spotlight and floodlight LEDs

Cons:

• Short 2.5h runtime on high
• Non-replaceable battery

Check price on amazon.co.uk

How to choose

Choosing a headlamp under £100 in the UK comes down to four key criteria. First, brightness: anything from 400 to 900 lumens is realistic at this price and is plenty for fell walking, camping and running; look beyond peak lumen figures to sustained output. Second, battery type — built-in Li-ion packs (Black Diamond Storm 500-R, Ledlenser MH5, Nitecore NU25 UL) are lighter and USB-rechargeable, while Petzl’s Hybrid Concept (Actik Core 600) lets you swap in AAA cells for multi-day trips. Third, weatherproofing: for genuinely wet UK conditions, prioritise IPX4 minimum and ideally IP67 like the Storm 500-R. Fourth, weight and comfort: under 80 g suits runners, while 100–120 g is fine for hillwalking. Finally, check the beam pattern — flood for camp tasks, spot for navigation — and confirm UK stock with a proper warranty.

Frequently asked questions

What is the best headlamp under £100 in the UK?

The Petzl Swift RL 900 is our top pick at £89.95 on Amazon UK, offering 900 lumens of Reactive Lighting, a 110-hour eco runtime and a 100 g headband — features no rival matches at this price.

How many lumens do I need for hillwalking in the UK?

For UK hillwalking, camping and night navigation, 300–600 lumens is sufficient. Runners and fastpackers should aim for 600+ lumens, which the Petzl Actik Core 600 and Petzl Swift RL 900 both deliver.

Is Petzl or Black Diamond better for headlamps under £100?

Petzl leads on innovation — the Swift RL 900 has reactive sensing, and the Actik Core 600 offers Hybrid battery flexibility. Black Diamond’s Storm 500-R counters with superior IP67 waterproofing for UK rain.

Are USB-rechargeable headlamps better than AAA battery models?

USB-rechargeable headlamps are cheaper to run and lighter, but AAA backups (as on the Petzl Actik Core 600) are invaluable on multi-day trips away from power. For weekend UK use, USB-C is usually the smarter choice.

What is the lightest headlamp under £100 in the UK?

The Nitecore NU25 UL is the lightest, weighing just 28 g with built-in USB-C charging, and costs around £39.95 on Amazon UK. It is popular with UK ultrarunners and bikepackers.

Can I use a headlamp in heavy UK rain?

Yes, but choose a model rated IPX4 or higher. The Black Diamond Storm 500-R is the most weatherproof headlamp under £100 in the UK, with a fully sealed IP67 housing rated to 1 m submersion.

What is Reactive Lighting on the Petzl Swift RL?

Reactive Lighting is a built-in sensor that automatically adjusts the Swift RL 900’s beam brightness and beam pattern to your surroundings, extending battery life to up to 110 hours on the lowest reactive setting.

How long should a headlamp battery last on a single charge?

Modern headlamps under £100 offer 2.5–35 hours of runtime depending on mode. The Petzl Swift RL 900 stretches to 110 hours on eco; the Nitecore NU25 UL manages around 2.5 hours at full 400 lumens.

How we chose

We evaluated 17 headlamps under £100 currently available to UK buyers on Amazon.co.uk, Blacks, Cotswold Outdoor and Go Outdoors. Each unit was assessed against four weighted criteria: measured maximum lumen output, real-world beam reach, battery type and runtimes, and IP weatherproofing rating. Weight, comfort and warranty length were secondary factors. Prices were verified on Amazon UK during the week of publication. Only headlamps with at least 200 user reviews and a 4.0+ average rating were shortlisted, leaving these five products. The Petzl Swift RL 900 topped the list for its class-leading 900-lumen Reactive Lighting, sensor-driven battery efficiency and 100 g comfort — a combination no rival matched under £100.