10 Best Black Light Flashlights 2025 in the United States

The Streamlight 66149 Stylus Pro is a compact UV penlight designed for those who need a reliable black light source. It emits UV light at 400nm wavelength, which is effective for many common uses like detecting stains, pet urine, or counterfeit money. Its UV output of 325 milliwatts provides a decent brightness without being too harsh. The flashlight is powered by a rechargeable lithium-ion battery that fully charges in about 2.5 hours using the included USB cord, making it convenient and cost-effective by eliminating the need to frequently buy disposable batteries.

You can expect around 2 to 2.5 hours of continuous UV light per charge, which is reasonable for short tasks but might require recharging for extended use. The aluminum body feels durable and sturdy, with a water-resistant sliding metal sleeve that protects the USB port, adding to its durability for everyday or outdoor use. Its slim, penlight shape and light weight under 4 ounces make it very portable and easy to carry in a pocket or holster.

It does not come with standalone lithium batteries to swap out, so you’re dependent on recharging it. While the UV output is stable due to regulated output, the runtime is moderate compared to some models with longer battery life. This flashlight suits professionals or hobbyists who need a dependable, rechargeable black light in a compact form, but those needing longer continuous use without recharging might want to consider alternatives.

The uvBeast New V3 365nm Black Light UV Flashlight is designed for professional and commercial use, offering high definition ultraviolet light at a 365nm wavelength. This is ideal since 365nm is considered the gold standard for UV light, providing superior results compared to 395nm wavelengths. The flashlight features triple LEDs that offer an impressive total UV radiant intensity of 5400 uW/cm2, making it one of the highest intensity devices in its category.

Additionally, the flashlight boasts a long-range beam capability, extending up to 60 feet, which is quite advantageous for various professional applications like inspections and forensic investigations. The light output is filtered to block unwanted visible light, ensuring maximum transmission of pure 365nm UV light. The build quality is robust, made from black anodized aerospace-grade aluminum, which promises durability and longevity.

It is also portable, weighing 13.3 ounces and measuring 8.66 x 2.17 x 0.91 inches, making it easy to carry around for different tasks. The flashlight is powered by 3 AA batteries, which are included, and is convenient for users who prefer non-rechargeable options. On the downside, it requires pre-installed batteries with an insulation tab that needs to be removed, which might be a minor inconvenience for some users. Despite this, the professional-grade specifications make it a reliable choice for those needing a high-performance black-light flashlight.

The uvBeast New V3 Black Light UV Flashlight is designed for professional and commercial use, offering significant advancements over older models with 100 LEDs. The flashlight operates within a wavelength range of 385-395nm, which is suitable for a variety of UV applications. Its light output is notably high, thanks to the upgraded triple 1.2A UV LEDs, providing a powerful beam that extends up to 70 feet, and potentially detecting UV fluorescence from even further distances.

This intensity makes it an excellent choice for tasks requiring strong UV illumination, such as inspections or forensic investigations. Additionally, the improved power delivery system of the V3 model helps to reduce running costs, offering more efficiency compared to previous versions that use older LED technology.

The flashlight is battery-powered. The build quality appears robust, with an aluminum body that promises durability. The uvBeast New V3 is a powerful and efficient UV flashlight best suited for professionals who need reliable and intense UV light output.