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Difference between revisions of "ANSI-NEMA FL-1"
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===Runtime=== | ===Runtime=== | ||
The amount of continuous runtime (in minutes) until the light output drops to 10% of its original value (measured 30 seconds after turning the light on). This test is done in an integrating sphere just like the lumen test with light output measured every 15 minutes. 10% of brightness probably gives inflated runtime numbers. In the past, some testers used 50% to be a little more practical, but with most batteries, the drop-off is usually pretty quick and the time between 50% and 10% usually is not long. | The amount of continuous runtime (in minutes) until the light output drops to 10% of its original value (measured 30 seconds after turning the light on). | ||
This test is done using the batteries included with the flashlight.<ref name="Machete">Machete God (1 November 2010) [http://www.cpfmarketplace.com/mp/showthread.php?240416-4Sevens-and-the-ANSI-NEMA-FL-1-standard#post2572176 Re: 4Sevens and the ANSI/NEMA FL 1 standard] ''CPFMarketPlace 4Sevens forum''. Retrieved 29 January 2013. "The FL1 standard calls for testing with the packaged cell, or in the absence of such, the recommended cell."<!--{{cite web | |||
| title = Re: 4Sevens and the ANSI/NEMA FL 1 standard | |||
| url = http://www.cpfmarketplace.com/mp/showthread.php?240416-4Sevens-and-the-ANSI-NEMA-FL-1-standard#post2572176 | |||
| work = CPFMarketPlace 4Sevens forum | |||
| accessdate = 29 January 2013 | |||
| date = 1 November 2010 | |||
| author = "Machete God" | |||
| quote = The FL1 standard calls for testing with the packaged cell, or in the absence of such, the recommended cell}}.--></ref> If no batteries are included, the test is done using the manufacturer-recommended batteries.<ref name="Machete" /> | |||
The test is done in an integrating sphere just like the lumen test with light output measured every 15 minutes. 10% of brightness probably gives inflated runtime numbers. In the past, some testers used 50% to be a little more practical, but with most batteries, the drop-off is usually pretty quick and the time between 50% and 10% usually is not long. | |||
===Peak Beam Intensity=== | ===Peak Beam Intensity=== | ||
Light intensity in candela at the brightest part of the beam. A lux reading in the brightest portion of the beam is taken at some distance with the light on its brightest mode and tightest focus at some | Light intensity in candela (cd) at the brightest part of the beam. A lux reading in the brightest portion of the beam is taken at some distance (2m, 10m, or 30m) with the light on its brightest mode and tightest focus at some time between 30 and 120 seconds of turning the light on. The lux reading is multiplied by the square of the distance in meters to get candela. Regardless of the distance at which the reading is taken, you should end up with the same value in candela, therefore the measurement is independent of distance. A lux reading taken at 1 meter distance is the same as candela (since 1 squared is 1). | ||
===Beam Distance=== | ===Beam Distance=== | ||
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[http://www.energizerlightingproducts.com/technology/ansistandard/Pages/environmentals.aspx Energizer] | [http://www.energizerlightingproducts.com/technology/ansistandard/Pages/environmentals.aspx Energizer] | ||
[http://www.inovalight.com/ANSIstandard/ Inova] | |||
==References== | |||
<references/> | |||