| As said, lux is the intensity hitting a surface. It's used a lot in building design because it specifies what the illumination on a surface should be at a certain distance from the light (like desks in an office) rather than specifying a light's output which is a bit irrelevant.
Are you sure the other torch's units are lux? I always thought lux levels were dependant on distance of the target from the source and various other environmental factors.
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