10 Best Black Light Flashlights 2025 in the United States

The Vansky UV Flashlight Black Light is a versatile and useful tool for detecting invisible stains, pet urine, and various other substances. With a wavelength of 395nm, it effectively reveals hidden stains on rugs, carpets, and clothes.

The light output comes from 51 UV LEDs, ensuring a bright and comprehensive coverage, which is particularly useful for inspecting wider areas or finding scorpions and minerals outdoors. However, it's important to note that it's powered by 3 AA batteries, which are not included in the package. This could be seen as a minor inconvenience since you will need to purchase the batteries separately.

The flashlight is made of durable aluminum, giving it a robust build quality that can withstand regular use. Despite its sturdy construction, it remains lightweight and portable, weighing only 1.76 ounces and featuring a compact design that fits easily in your pocket. This makes it convenient for carrying around for tasks like hotel cleanliness inspections or detecting pet urine in your car.

With a lifespan of 15 years for the LEDs, this flashlight is built to last. It also offers a range of versatile uses beyond pet urine detection, such as authenticating currency, curing UV resin, and even identifying unwanted substances in cosmetics. However, its reliance on batteries could mean frequent replacements if used extensively. The product also comes with a 1-year manufacturer's warranty, adding an extra layer of assurance. If you're looking for a durable and versatile UV flashlight with good light output and portability, the Vansky UV Flashlight Black Light is a solid choice.

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 GearLight UV Black Light Flashlight S100 comes as a convenient 2-pack of compact ultraviolet flashlights, each about 5.25 inches long and light enough to easily carry in your pocket or attach with the included clip. These lights use LED bulbs that emit UV light to reveal things like pet stains, bed bugs, or counterfeit money that are invisible in regular light. Powered by 2 AAA batteries each (not included), they offer decent battery life but you’ll want to keep spare batteries handy if used frequently.

The flashlights are built strong with military-grade aluminum, making them durable enough to handle drops and brief exposure to water, which is great for everyday use or outdoor inspections. The small size means the beam may not cover large areas quickly, so it’s best suited for spot checks rather than wide inspections.

These flashlights are a solid choice for anyone needing a portable, durable UV light for household or travel use, especially for spotting stains, pests, or verifying items discreetly.