Center spot lumens:If brightness is listed as lumens rather than ANSI lumens, the manufacturer may be using a center spot reading only. The procedure for measuring center spot lumens is almost identical to the one for ANSI lumens, except that you only measure the one spot at the center of ...
Measured in lumens. This is a measure of the intensity of the light coming out of the flashlight on the highest brightness setting powered by new batteries. It may also be shown for multiple light settings. This is a great comparison tool, but does not tell the whole story about brightness...