Product Name: UV LED Flashlight High Power Nichia 365nm 3W Model NO.: TY-B-S-3W Surface Preparation of ReflectingCup: Smooth Material of Reflecting Cup: metallic Waterproof Rating: IPX8 Battery Type: 18650 With Light Source: With Light Source Material: Copper Light Range: <50m Power Supply: Rechargeable Battery Charging Type: Rechargeable Lighting Period (H): 5-10 Bulb Type: LED Watts: 3W Wavelength: 365nm Trademark: TaoYuan Transport Package: Carton Specification: Ce Rohs Origin: China HS Code: 8531200000 Product Description ItemSymbolAbsolute Maximum RatingUnitForward CurrentIF700mAPulse Forward CurrentIFP1000mAAllowable Reverse CurrentIR85mAForward VoltageVF3.8-4.4VPeak WavelengthP365nmRadiant Fluxe390mWTY-NCSU033B-S hostRechargeable lithium battery (and a spare battery).This is the UV365nm, the brightest single-die LED UV flashlight available. Designed for FPI NDT, Fluorescent Penetrant Inspection Non-Destructive Testing, it dramatically exceeds the ASTM minimum intensity standard of 1000µ W/cm² " 15". The factory-focused beam creates a bright 20mm spot of 365nm UV light at over 25, 000µ W/cm² " 15" surrounded by a 50mm beam at over 15, 000µ W/cm² .For its UV source, the UV365nm uses a genuine, Japanese Nichia NCSU033B(T) 365nm LED. It's up to 34% brighter than the original Hoplite, throwing as much as 390mW of UV. Per the Nichia factory documentation which can easily be found on line, the vast majority of emission from this device is very narrow; At or close to 365nm, with 380+nm radiation not appearing until about. 05nm