Candlepower vs. Lux
With most flashlights, their brightness is measured in terms of candlepower, or lumens. However, this kind of measurement doesn't say how effectively that light is being used.
Since LensLights are focused, we measure the amount of
concentration of light, or lux that they produce.
LensLight doesn't take the brute force approach to getting more brightness. Rather, it acheives it by using it's light source in the most efficient way possible.