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 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.

The OLIGHT Arkfeld Ultra is a compact and versatile pen-flashlight designed for everyday carry and outdoor use. It delivers a strong 1400 lumens of white light, which is bright enough for most tasks like working, camping, or emergency needs. In addition to the white beam, it offers a UV light and a green beam, expanding its usefulness for checking items, detecting stains, or special signaling.

The flashlight uses a rechargeable lithium polymer battery, which is convenient and eco-friendly, and it includes a magnetic charging cable for easy recharging. Its size is slim and lightweight (just over 4 ounces), making it comfortable to carry in a pocket without feeling bulky. Made from O-aluminum, the Arkfeld Ultra feels sturdy and durable, with a high-quality glass lens that resists scratches and maintains clear light output over time. The matte olive-green finish gives it a sleek, modern look, and it is also waterproof, which helps in various weather conditions.

While it has multiple beams, the green and UV lights are relatively low power (green ≤5mW), so they are best suited for specific tasks rather than illumination. Also, the compact size means its battery life might be shorter under high brightness use compared to bigger flashlights. This pen-flashlight is ideal for those looking for a reliable, multi-purpose light that can handle daily tasks, outdoor adventures, and specialized needs without taking up much space.