Manufacturer: Nitecore
LED: Luminus SST-40-W LED
Peak Beam Distance: 368 yards
Peak Beam Intensity: 28500 cd
IP Rating: IP68 - 2m submersible
Impact Resistance: 1 m
Dimensions: L-5.93"xH-1.25"xT-1"
Weight: 4.37oz

Pros:

• An optical system combined with crystal coating and “Precision Digital Optics Technology” (PDOT)
• Highly efficient constant current circuit provides a stable output for up to 50 hours
• Dual Tail switches enable intuitive operations for tactical applications
• STROBE READY Technology to enable a quick access to STROBE Mode
• UV light utilizes 4 x UV LEDs
• Rechargeable via usb-c port
• Built-in power indicator that flashes to show power level remaining
• Silicon nitride ceramic inlays in bezel
• Tactical Mode and Daily mode available
• Power indicator beside the charging part indicated the remaining battery power, voltage
• Incorporated Advanced Temperature Regulation (ATR) module
• Optical Lenses with double-sided scratch resistant coating
• Constructed from aero grade aluminum alloy
• HA III military grade hard-anodized finish
• Waterproof and dustproof

Cons:

• Modes/Brightness Output: High (1800 lumen/1hr), Mid (250 lumen/3hr15min), Low (35 lumen/18hr), UV (320mW/18hrs), Strobe (1800 lumen/--)
• 1800 lumen max brightness

Comments: Combining powerful output, long runtime, and tactical features with an ultraviolet light, the Nitecore P20i UV Rechargeable Tactical LED Flashlight will meet the needs of professionals in a wide range of disciplines. Its four UV LEDs are useful for currency and document inspection, forensic investigation, mine exploitation, and gemological appraisal. As a torch, the P20i UV LED emits up to 1800 lumens of white light, and the low-power setting of 35 lumens will run as long as 38 hours on a fresh charge. The high-capacity 4000mAh 21700i Li-ion battery charges inside the light through a moisture-protected USB Type-C port, and there's also a side-mounted LED that shows the battery's remaining power level.