Difference between revisions of "ANSI-NEMA FL-1"

ANSI-NEMA FL-1 (view source)

35 bytes added , 23:43, 1 January 2011

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 ===Beam Distance===
-The distance in meters at which the flashlight produces a light intensity of 0.25 lux. This is not very bright, about equal to a full moon. This distance is not actually measured. Instead the value is calculated by dividing the peak beam intensity measured above, dividing by 0.25 lux, and taking the square root of the result. For example, the Quark AA has a peak beam intensity of 1,622 cd. Divide this by 0.25 to get 6,488. Now take the square root to get 80.55. This agrees with the value on the packaging, which is rounded to 81 meters.
+The distance in meters at which the flashlight produces a light intensity of 0.25 lux. This is not very bright, about equal to a full moon. This distance is not actually measured. Instead the value is calculated by taking the peak beam intensity measured above, dividing by 0.25 lux, and taking the square root of the result. For example, the Quark AA has a peak beam intensity of 1,622 cd. Divide this by 0.25 to get 6,488. Now take the square root to get 80.55. This agrees with the value on the packaging, which is rounded to 81 meters.
+[[File:Eqn-throw.png|center|400px]]
 ===Water Resistance===