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The Nitecore UT27 Pro is a lightweight trail running headlamp equipped with variable CRI multiple colour temperature LEDs, offering three distinct colour temperatures and CRI options. It delivers a maximum output of 800 lumens with a beam distance of 168 metres, and features dual power source compatibility. Equipped with two NiteLab Quad-core MCT UHE White LEDs, it offers primary lights in 6500K cool white (CRI 73), 4500K neutral white (CRI 83), and 3000K warm light (CRI 97), complemented by an auxiliary red light source with constant-on and slow flashing. An optical dual-lens system with TrueVision+ technology ensures a uniform and soft wide-range flood beam. Power is supplied by either an included Nitecore HLB1500 rechargeable lithium-ion battery pack with USB Type-C recharging, or three AAA batteries, providing a maximum runtime of 14.5 hours. This Pro version also includes a spare HLB1500 battery pack, while remaining compatible with 3 x AAA batteries. Additional features include a glow-in-the-dark battery compartment, dual switch design, power indicators, and Advanced Power Cut-Off technology for ultra-low standby consumption. Built from durable PC materials, it has an IP66 ingress protection rating and 1m impact resistance, with a 90° adjustable tilt angle and a comfortable, breathable headband.
NOTE: This is identical to the Nitecore UT27 (Standard Version), but comes with a spare HLB1500 Battery pack.
How to read the data: The outputs provided above are maximum outputs for each mode, and the runtimes provided are the time it takes to drop to 10% of the initial output. This is in line with the International Flashlight Testing Standard ANSI FL1.
Any visual representations (graphs) of the data are approximate only.
The actual output of the torch/headlamp is controlled by an in-built temperature regulation system. As the torch/headlamp heats up, the brightness will drop to prevent overheating. The Turbo modes of torches/headlamps usually drop down significantly after anything from 15 seconds to 2 minutes. High modes often also experience a drop down over time. Medium and Low modes, however, can be constant for very close to the length of time specified. As the torch/headlamp cools down, either from being turned off or from being used on a low output level, you will be able to access higher brightness levels again.
Turbo and high modes may be unavailable or limited as the battery gets low on charge.
Summary: An output of 2000 lumens and runtime of 5 hours (for example) does not mean 2000 lumens for 5 hours — it means it starts at 2000 lumens and drops below 200 lumens after 5 hours of continuous use.
Exact specifications can vary between torches, batteries, age and environments.
All of the above data is published by the manufacturer, and reproduced here for the benefit of the customer.
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