The light turns red quickly when using indicating it needs charging but when i plug it in, almost immediately turns green? Turns red again when used?

[Please note]: If the flashlight is not used for a long time, the battery may be in a virtual state, which might cause the flashlight to initiate a red light reminder indicating a lack of power. [We suggest]: 1. Unscrew the tail cap of the flashlight (disconnect the battery) then screw back the tail cap back (reconnect the battery to the flashlight). 2. Charge it again, turn on the flashlight to restore the normal power indicator. [Important Tips]: When you do not use the flashlight for a long time, please charge the battery every two months to maintain optimum performance. Dear friend, if you need more help, please contact DARKBEAM's customer service directly. We offer 24-hour prompt response and will serve every customer wholeheartedly.

How many lumens does this output?

I believe the criteria for these lights is more of the UV spectrum. Lumens is more for visible white light...but I could be wrong about this.

Should I wear UV glasses with this and if not, why?

Hello, Thanks for asking the question. [Please note]: UV light is ultraviolet light, please do not look directly at UV light. If you need to use the UV flashlight continuously for a Long Time, we recommend that you wear the UV protective glasses to avoid eye burns from UV light. Your eyes may feel discomfort from prolonged exposure to high intensity UV light. If you only use it for a short period of time, such as a quick banknote inspection, checking for cat ringworm, etc., it is okay not to wear UV glasses (However, the safest way is to continue wearing UV glasses). Hope to help you.

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Description

🔦 Illuminate the unseen, own the moment.

ALL DAY POWER - Up to 8 hours of continuous use on a single 3-hour USB charge keeps you ready anytime.
SLEEK DURABLE - Premium aluminum alloy body combines lightweight portability with rugged reliability.
VERSATILE DETECTION - Perfect for pet urine, resin curing, anti-counterfeit checks, and fluorescent inspections across all surfaces.
ONE CLICK SIMPLICITY - Effortless single-mode operation—just click to toggle UV light on/off, no fuss.
INVISIBLE UV PRECISION - 365nm wavelength targets fluorescent agents & security codes with unmatched accuracy.

The DARKBEAM UV 365nm Flashlight is a compact, rechargeable handheld blacklight designed for professional-grade fluorescent detection. Featuring a precise 365nm UV wavelength, adjustable focus, and up to 8 hours of runtime, it excels in applications like pet urine detection, resin curing, and anti-counterfeit verification. Its durable aluminum body and USB charging make it a must-have tool for on-the-go professionals seeking reliable, high-performance UV illumination.

Specifications

Color	UV 365nm - 1 Pack
Power Source	Battery Powered
Light Source Type	UV
Material	Aluminum
Included Components	Battery, USB Charging Wire x1
Product Dimensions	0.9"D x 0.9"W x 5.12"H
Voltage	5 Volts
Battery Cell Composition	Lithium Ion
Item Weight	0.13 Kilograms
Number of Batteries	1 Lithium Ion batteries required. (included)
Water Resistance Level	Waterproof
Brand	DARKBEAM
Battery Description	Lithium-Ion
Style	Compact
Finish Type	Brushed
Mounting Type	Handheld with Clip
Manufacturer	DARKBEAM
Part Number	UV 365NM Rechargeable Flashlight
Item Weight	4.6 ounces
Item model number	A300-uv365
Batteries	1 Lithium Ion batteries required. (included)
Item Package Quantity	1
Shape	Cylindrical
Finish types	Brushed
Number of Lights	1
Batteries Included?	Yes
Batteries Required?	Yes
Wattage	10 watts
Bulb Features	Detection of fluorescent agents and security codes

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