Lumens: When it comes to measuring light intensity, the intensity is usually given in units called lumens. Strictly speaking, it’s the unit of “luminous flux”--how much light is emitted by a light source in all directions. We can also say that lumens are the intensity of light emitted from a light source, which the human eye can detect. When it comes to a flashlight, the lumens is the rating used to signify how powerful or bright the flashlight can shine. The intensity of the most bright flashlight can start from around 10,000 and go up to 100,000 Lumens. But you’ll find very bright flashlights rated at 2000 lumens.

Power Source: The power source is also an important part of how bright the flashlight will be. Since these bright flashlights emit high-intensity light, their energy consumption can be high, and they need a power source for smooth operation. Most of these flashlights are powered by a rechargeable battery or set of batteries. They’ll charge up in a charging device, or maybe even by means of a USB cable, as in the Lumintop Mini-Torch.

Optics: Besides using a super-bright LED lamp, some flashlights will have optics that enhance the light. Lumintop’s Mini-Torch has a TIR (=Total Internal Reflection) optical lens that produces a uniform beam of light.

Brightness: An HID flashlight is a great choice if you need a flashlight that is very bright, for a very long period of time, like on a long-distance hike at night. An example is the Goodsmann HID Portable Handheld Light, with 2000 lumens of light. For LED flashlights, you can get an Anker LC90 flashlight, at 900 lumens.

Pricing: This is one factor a lot of people overlook, and it can be a deciding factor on the type of flashlight you get. HID flashlights are one the most expensive flashlights out there, while you can get a good LED flashlight for around £26.

Design: Another consideration is the design of the flashlight. There are headlamp flashlights that you can wear as a headband. There are also tactical flashlights, which have a high Ingress Protection (IP) rating, so that they are resistant against the penetration of water and dust.

IMALENT is one of the leading brands in bright flashlights, as they have some of the brightest products in the market. Their Imalent MS18W can produce 100,000 lumens!

Fenix is also a leading name in bright flashlight, and is certainly worth a try. They also make headlamps, lanterns, bike lights, and more.

Noctigon is a manufacturer of top-notch LED flashlights, with special LED optics and anti-reflective lenses. They make flashlights that employ a series of LEDs, arranged in a ring.