Nitecore UT27 MCT High CRI Three Color Temperatures Lightweight Trail Running Rechargeable Headlamp -800 Lumens w/ Clip, Diffusing Stuff Sack, Battery, and Eco-Sensa Charging Cable Included. 

MCT (Variable CRI Multiple Color Temperatures) Lighting System. Featuring a symmetrical arrangement of high-CRI and high-efficiency cores, paired with a multi-faceted optical lens system, the MCT UHE LEDs create a lighting system with multiple CRI options, color temperatures, and high luminous efficiency. It faithfully renders the true-to-life colors and fine details of outdoor environments, and provides adaptable lighting for complex and changeable outdoor conditions.

The UT27 is equipped with 2 quad-core MCT UHE LEDs, offering three color temperatures and three CRI options.

    3000K Warm Light, CRI 97 – Ensuring clear visual perception in high-risk environments
    4500K Neutral White Light, CRI 83 – Fearless in medium-risk technical terrain
    6500K Cool White Light, CRI 73 – Ready for low-risk everyday environments with superior brightness and efficiency, and extended runtime

It comes with a 1,500mAh rechargeable Li-ion battery, providing up to 14.5 hours of runtime at 100 lumens and delivering a maximum output of 800 lumens with a maximum throw of 168 meters. It's also compatible with three AAA batteries – no more battery anxiety.

Furthermore, the bracket gets strengthened while the weight remains at only 74g (2.61 oz). The included clip and diffusing stuff sack add versatility, while the IP66 rating with an impact resistance to 1 meter ensures worry-free outdoor use. 

UT27 MCT SPECIFICATIONS

• Max Output 800 Lumens
• Max Beam Distance 168m
• Max Beam Intensity 7,124cd
• Max Runtime 14 h 30 min
• LED NiteLab MCT UHE LEDs
• Battery HLB1500 Rechargeable Li-ion Battery Pack, 3 × AAA
• Special Modes SLOW FLASHING
• Beam color 3,000K Warm Light (CRI 97), 4,500K Neutral White Light (CRI 83), 6,500K Cool White Light (CRI 73)
• Dimensions 56.0mm x 46.6mm x 32.0mm ( 2.20" x 1.83" x 1.26")
• Weight 74g (2.61 oz)
• Feature Dual Hybrid Power Source, Multiple Color Temperatures, High CRI
• Activity Outdoor/Camping, Hiking/Trekking, Trail Running, Night Running

UT27 MCT FEATURES

• Utilizes two quad-core MCT (Multiple Color Temperatures) UHE LEDs 
• Equipped with primary lights offering three color temperatures: 6,500K cool white light (CRI 73), 4,500K neutral white light (CRI 83), 3,000K warm light (CRI 97)
• Designed with auxiliary red lights that support constant-on lighting and slow flashing for warning
• Adopts an optical dual-lens system with various facets and the TrueVision+ technology to deliver a uniform and soft wide-range flood beam
• Max output of 800 lumens and max throw of 168 meters
• Includes a HLB1500 Rechargeable Li-ion Battery Pack (1,500mAh) with a built-in USB-C charging port. It is also compatible with 3 x AAA batteries
• Highly efficient constant current circuit provides a stable output of up to 14.5 hours
• Glow-in-the-dark battery compartment for easy battery replacement and location
• Dual switch design for easy access to various light sources and brightness levels
• Power indicators can indicate the remaining battery power
• Advanced Power Cut-Off (APC) technology for an ultra-low standby power consumption
• 90° adjustable tilt angle for various lighting needs
• Includes a specially designed lightweight, skin-friendly and breathable headband, and a diffusing stuff sack
• Made from durable PC materials
• Waterproof and dustproof rating in accordance with IP66 
• Impact resistant to 1 meter