10 Best Pen Flashlights 2025 in the United States

The Streamlight 66134 Stylus Pro USB is a slim, lightweight pen flashlight designed for professionals like medical staff, law enforcement, and technicians who need a reliable light for close-up or low-light work. It delivers a bright 350 lumens output with a beam reaching about 109 meters, which is impressive for its compact size and ideal for inspecting small or confined spaces. Its rechargeable lithium-ion battery offers up to 1.5 hours on high brightness and charges quickly via USB in roughly 2.5 hours, removing the need for disposable batteries.

Durability is a strong point here—the aluminum body is water-resistant (IPX4) and can withstand drops from up to 1 meter, making it tough enough for everyday professional use. The light’s ultra-slim design and light weight (just 1.76 ounces) make it easy to carry in pockets or clips. The sliding metal sleeve protects the USB charging port, adding to its ruggedness.

This pen light is a solid choice if you want a dependable, bright, and rechargeable flashlight that's durable and portable for professional or everyday low-light tasks. It may not be the best fit for those needing long-lasting battery life or a very long beam, but for most inspector or medical uses, it covers the essentials well.

The OLIGHT Arkfeld Pro is a compact and versatile pen-flashlight designed for everyday carry and outdoor use. It packs a strong 1300-lumen white LED, delivering bright and clear illumination suitable for most tasks. What sets it apart is the inclusion of three light sources: white, green beam, and a powerful UV light at 365nm, which is stronger and more professional than typical UV flashlights. This makes it useful not just for general lighting but also for specialized needs like detecting fluorescent materials or working in dark environments.

The flashlight is rechargeable with a built-in lithium polymer battery, and it features a helpful battery level indicator that shows you how much power remains, so you’re not caught off guard. Its sturdy aluminum build offers good durability and water resistance, making it reliable in various conditions. The size is compact, fitting comfortably in your pocket at just under 5 inches long and weighing about 6 ounces, so it’s easy to carry around all day.

Switching between the three light modes is done via a circular selector, which is intuitive but might take a little getting used to if you prefer simpler on/off buttons. The green beam output is low-powered (class 3R), which is safe but less bright compared to the white light, mainly serving specialized purposes rather than wide illumination. For those seeking a pocket-friendly flashlight that covers general bright lighting and also offers UV and green light options for outdoor, emergency, or work use, the Arkfeld Pro represents a solid choice. However, if you only need a basic white light or prefer simpler controls, this might feel a bit more complex than necessary.

The Streamlight 66601 MicroStream is a compact, pen-sized flashlight designed for everyday carry. It delivers a bright output of 250 lumens on high mode, lighting up to 68 meters, which is impressive for its small size. There’s also a low mode with 50 lumens for longer battery life, lasting about 3.5 hours, while the high mode runs for around 1.5 hours. It uses a rechargeable lithium-ion battery, eliminating the need for disposable batteries, and charges conveniently with a USB cable. The flashlight is made from durable aluminum, offering good resistance to wear and water, making it reliable for outdoor and emergency use.

Weighing just 1.2 ounces and measuring under 4 inches, it’s easy to carry without feeling bulky. The switch is a user-friendly push-button on the tail, which also shows charging status through red and green lights. A metal sleeve protects the charging port from dust and damage. It includes a removable pocket clip and a strong lanyard for different carry options. The runtime on high is relatively short, so frequent charging might be needed if used heavily. Also, the beam distance is decent but not exceptional compared to larger flashlights.

This flashlight is ideal for those who want a reliable, lightweight, and rechargeable pen-flashlight for everyday tasks, quick inspections, or outdoor adventures where portability and brightness matter most.