10 Best Pen Flashlights 2025 in the United States

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.

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 stands out in the pen-flashlight category thanks to its impressive 1300 lumens brightness, which is quite strong for its small, portable size. Its triple light sources — white LED, green beam, and a high-intensity UV light — add versatility, making it useful not only for everyday tasks but also for emergency work and specialized uses like UV inspection. The green beam is low power (<5mW), suitable for close-up viewing without causing eye strain.

It uses a rechargeable lithium polymer battery, which is convenient and environmentally friendly compared to disposable options. The battery level indicator is a helpful feature, so you won’t be caught off guard by a dead battery. With dimensions just under 5 inches long and weighing about 6 ounces, it’s slim and light enough for easy pocket carry, fitting well in the EDC (Everyday Carry) category. The durable aluminum body hints at good resistance to bumps and water, enhancing reliability in various conditions.

Switching between modes is done via a circular selector, which should be straightforward for most users, though some might prefer a simpler on/off button. This flashlight is ideal for anyone needing a compact yet powerful light with multiple functions, especially if UV or colored light options are valued. However, if you only need a simple white light pen-flashlight, the extra features might be more than necessary.