Nitecore NU27 Headlamp Review: Multicolor Temperature Light That Gets Comfort Right

Introduction

I do not spend much time with headlamps, but after a month with the Nitecore NU27, that is likely to change. This is a light that arrived right around its release, so it has had plenty of real use: evening walks, quick tasks in the dark, and plenty of hours simply worn on a hat.

The headline appeal is easy to state. It is extremely light, it is one of the more comfortable headlamps I have worn, and it offers warm, neutral, and cool white output from the same four LEDs, something Nitecore claims makes it the first multicolor temperature outdoor headlamp. At $44.95, it undercuts a lot of the competition while still delivering 600 lumens at turbo.

What Comes in the Box

Nitecore includes more than the usual quick start guide. Alongside the headlamp you get a USB-A to USB-A charging cable, a carrying pouch, and a multi-purpose clip that may be the best included accessory in the package.

The pouch doubles as a diffuser: drop the NU27 inside and you get a soft, lantern-like glow that works nicely for tent lighting. The clip is the standout. Slide off the elastic band, attach the clip under it, and the light can mount on the brim of a cap, a backpack strap, or just about anything else. Nitecore could easily have sold that as an optional extra, so including it earns real credit.

Specs at a Glance

The NU27 tops out at 600 lumens with a maximum throwing distance of 123 meters and a peak intensity of 3,750 candela. Maximum runtime is a claimed 57 hours on ultra low. The four NiteLab MCT UHE LEDs are rated for roughly 50,000 hours and produce three color temperatures: warm at 3,000K, neutral at 4,500K, and cool at 6,500K.

Power comes from a built-in 850mAh lithium-ion rechargeable battery, charged through a USB-C port on the side, protected by a rubber flap that keeps dirt and water out. The body is high-strength polycarbonate, measures 2.58 by 1.33 by 1 inch, and weighs exactly 2 ounces (58 grams) with the headband attached. The dust and water rating is IP66, meaning fully dustproof and protected against powerful water jets but not submersible, and it is impact resistant up to 1 meter.

There are also three special modes: beacon, SOS, and an auxiliary red light.

Comfort, Build, and Wearability

This is where the NU27 shines. The elastic headband is very comfortable, extremely lightweight, and air-rated with ventilation holes throughout, so wearing it directly on your forehead does not get sweaty. Much of the writing on the band is reflective, including the rear, which makes it a reasonable choice for riding a bike at night.

A small grip ring inside the body helps the light hold steady on a cap without sliding around. Worn over a baseball cap, I could barely tell it was there. The head also swivels to tilt the beam downward, though the range of motion is far more useful with the clip mounted on a cap brim than with the band over a hat.

Brightness Levels and Real-World Beam

There are five white light brightness levels. Ultra low sits at 6 lumens with a 57-hour runtime, low at 70 lumens for 13 hours, mid at 200 lumens for 6 hours 30 minutes, high at 400 lumens for 3 hours, and turbo at 600 lumens. The mode spacing is genuinely well judged, with even 200-lumen steps between mid, high, and turbo, and the 6-lumen ultra low is plenty low for a headlamp.

In practice, mid at 200 lumens is the sweet spot. It is where the light stayed for most of a month of use, throwing a wide, evenly spread beam that lights a decent area just by moving your head. Turbo adds brightness, though the difference between levels is subtle on camera because the steps are consistent.

The auxiliary red light offers 5 and 15 lumen levels plus a flashing mode, and SOS and beacon both run at 400 lumens. It would be nice to see those special modes at the full 600, but 400 is workable.

Color temperature switching is the feature that makes this light fun. A single click of the mode button cycles neutral, warm, and cool white, all produced by the same four emitters. Warm is lovely for close-up tasks and preserving night vision, neutral is the everyday default, and cool reads crispest for detail work.

User Interface: Simple with Some Odd Choices

The UI is mostly straightforward. Press and hold the power button to turn on white light starting at low, then single click to cycle low, mid, and high. Double click for turbo. Press and hold again to turn it off. From off, double click reaches ultra low, which takes some getting used to since most lights use press-and-hold from off for their lowest mode.

Press and hold the mode button to activate auxiliary red, starting at low. Here is the confusing part: to switch red brightness levels you have to single click the power button, not the mode button you just used. Triple click the mode button for SOS, then short presses of the power button cycle beacon and flashing red. Press and hold either button to turn everything off.

A lockout feature is included: press and hold both buttons for about two seconds and the light flashes to confirm it is locked. Repeat to unlock.

One notable omission is mode memory. Turn the light off on high and turn it back on, and it starts at low again. It is a strange decision on an otherwise well-sorted light, and the single most requested fix for a future version.

Things to Consider Before Buying

The mode memory gap is the biggest complaint, but not the only one. The battery is built in, so there is no swapping in a fresh cell when it runs flat; you have to stop and recharge. Anyone who prefers the simplicity of an AA headlamp will notice that trade-off.

The special-mode switching logic is also clunky, as described above, and there is no runtime figure published for turbo. My own lumen testing confirmed the output steps match the claimed levels closely, and turbo held up well before stepping down, though treat any home bench test with a grain of salt.

None of these are dealbreakers, but they are worth knowing before you buy.

Buying Advice

At $44.95, the value here is hard to argue with. You are getting a sub-2-ounce, genuinely comfortable headlamp with a useful IP66 rating, a 57-hour maximum runtime, three color temperatures, and an accessory package that includes a clip and lantern pouch most brands would charge extra for.

Choose it if you want a lightweight all-rounder for camping, evening walks, dog walking, or occasional night riding, and you like the idea of switching between warm, neutral, and cool white on the fly. The clip also makes it a capable cap-brim light or clip-on area light. Skip it only if swappable batteries are essential or if starting every session on low will drive you up the wall.

Conclusion

The Nitecore NU27 is one of the most comfortable and versatile headlamps available at this price, and the multicolor temperature LEDs are more than a gimmick; they change how you use the light day to day. The missing mode memory and quirky special-mode controls keep it from being a perfect package, but none of it outweighs the comfort, the 600-lumen output, and that $44.95 price. It is an easy recommendation, and a light that may well earn headlamps a more regular place in future coverage.