Nitecore NU25 MCT UL Ultralight Headlamp
- Light Output Maximum: 400 lumens
- White Brightness: 400 lumens
- Runtime: 2 hours
- Battery Life: 45 hours
Last refreshed Sep 10, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An ultralight headlamp that trades raw lumens for genuinely useful color-temperature switching and a full gram-conscious backpacking kit.
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ASIN: B0FGFQM41TModel: NU25 MCT ULCategory: Headlamps
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Overview
The Nitecore NU25 MCT UL is an ultralight 400-lumen headlamp weighing 1.65 ounces that switches between warm, natural and cool white color temperatures at the push of a button, plus a separate red auxiliary light, aimed at backpackers who count grams.
The multi-color-temperature feature separates this from most headlamps in this set: warm light for cutting through fog or rain, neutral for daily tasks and cool white for outdoor contrast, all from one LED rather than needing separate lamps. At 1.65 ounces it is built specifically for backpackers and trail runners weighing every item in a pack, and it includes SOS and beacon modes for signaling.
- 1.65 ounce ultralight body
- Warm, natural and cool white color temperatures
- 400 lumens, 144 yard beam distance
- USB-C rechargeable, up to 45 hour runtime
Who it's for
Fits backpackers, trail runners and ultralight campers who prioritize low weight and adjustable light color over raw brightness. Not the pick for anyone needing a high-lumen flood for work-site tasks, since 400 lumens sits well below the output of heavier lamps in this set.
Pros and cons
- Weighs only 1.65 ounces
- Switches between warm, natural and cool white light
- USB-C recharges in about an hour
- Includes SOS and beacon signaling modes
- 400 lumens is lower output than several other headlamps here
- IP66 resists water jets but is not a submersion rating
Performance notes
Peak output is 400 lumens with a claimed beam distance of 144 yards, and the built-in USB-C port recharges the lamp in just over an hour for up to 45 hours of runtime depending on mode. The PC housing carries an IP66 water resistance rating and is built to survive a 1-meter impact.
Specifications
| Brand | Nitecore |
|---|---|
| Model | NU25 MCT UL |
| Dimensions & fit | |
| Item Weight | 0.1 pounds |
| Item Dimensions D x W x H | 2.4 × 1 × 1.3 inches |
| Item Dimensions L x W x H | 2.4 × 1 × 1.3 inches |
| Capacity & performance | |
| Light Output Maximum | 400 lumens |
| Power & efficiency | |
| Battery Life | 45 hours |
| Power Source | Battery |
| Battery Type | Lithium Polymer |
| Battery Description | Lithium-Ion Polymer |
| Construction & materials | |
| Material Type | Plastic |
| Color | MCT Black |
| Finish Types | Matte Black |
| Compatibility & installation | |
| Mounting Type | Head Mount |
| Included components | |
| Number of Packs | 1 |
| Unit Count | 1 |
| Included Components | Charging Cable, Head Band, Headlamp |
| Warranty & support | |
| Manufacturer Warranty Description | 2 years |
| Warranty Type | Limited |
| Other details | |
| White Brightness | 400 lumens |
| Runtime | 2 hours |
| Water Resistance Level | Water Resistant |
| Number of Light Sources | 4 |
| Shape | Headlamp |
| Light Source Type | LED |
| Number of Items | 1 |
| Number of Batteries | 1 |
| Light Path Distance | 144 yard |
| Style Name | Headlamp |
| Specification Met | ANSI FL1 |
Frequently asked questions
How much does the Nitecore NU25 MCT UL weigh?
It weighs 1.65 ounces total.
Can the NU25 MCT UL change light color, not just brightness?
Yes, it switches between warm, natural and cool white color temperatures with a button push, plus a separate red auxiliary light.
How long does the NU25 MCT UL run on a charge?
Up to 45 hours depending on the output level selected, with a recharge time of just over one hour via USB-C.