The highest-intensity flashlights available on the market are often referred to as "tactical" or "high-performance" flashlights. These flashlights are designed to produce an incredibly bright and powerful beam. The intensity of a flashlight is typically measured in lumens, which indicates the total amount of visible light emitted by the flashlight. While there are various flashlights claiming to have the highest intensity, the actual output can vary. As of my knowledge cutoff in September 2021, some high-performance flashlights can produce up to 30,000 lumens or even more, providing an exceptionally intense beam of light.