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 OLIGHT IMINI 2 EDC Rechargeable Keychain Flashlight is a compact and lightweight flashlight that fits well in the pen-flashlight category, making it a great choice for everyday carry or emergency situations. With a brightness of 50 lumens, it offers adequate illumination for close-range tasks, although it may not light up larger areas due to its limited beam distance of 1.5 meters. The built-in rechargeable battery is a significant plus, allowing for convenient charging through a USB plug, which takes just 60 minutes for a full charge.

One of the standout features is its instant activation; you can turn it on simply by detaching it from the magnetic cap, which is user-friendly. The flashlight also has a magnetic base, enabling a hands-free experience when attached to metal surfaces—ideal for tasks that require both hands.

While the 50-lumen output is sufficient for many everyday uses, it may not be bright enough for tasks that require more powerful lighting. Additionally, the flashlight is designed primarily for close-range visibility, which might limit its effectiveness in certain outdoor scenarios. The small size and lightweight design (only 19.5 grams) are perfect for carrying around, but users should be cautious with its durability despite being made of aluminum and rated for a 1.5-meter drop resistance.

The GearLight S100 LED Pocket Pen Light is designed for those who need a reliable and compact flashlight for close-up tasks. Its standout feature is its compact size, measuring just 5.25 inches in length and weighing 1 ounce, which makes it ideal for carrying in a pocket or clipping onto a belt or bag. This portability is enhanced by the included removable clip, making it a convenient choice for professionals like nurses and mechanics, as well as for everyday use in inspections or repairs.

The flashlight offers a brightness level of 100 lumens, which is suitable for lighting up concentrated areas. Powered by two AAA batteries, it provides adequate illumination for various tasks, although the batteries are not included with the purchase. The light source is LED, known for its energy efficiency and longevity, further adding to the product's appeal.

In terms of durability, the GearLight S100 is made from military-grade aluminum, making it tough enough to withstand drops and temporary water exposure. This durability makes it a reliable choice for rough handling situations, such as outdoor activities or emergencies. The flashlight's design also features an easy-to-use switch, enhancing its practicality in urgent scenarios. Potential buyers should consider the need for frequent battery replacements, given the reliance on AAA batteries, which may be a downside for some. This pen-flashlight is best suited for those prioritizing portability and durability over high lumens or extensive beam distance.