Portable light performance
Degree of protection against water
|JIS C 0920 / IEC 60529
||Protected against vertical falling water drops
||Water resistant type I
||Protected against vertically falling water drops when enclosure tilted up to 15°
||Water resistant type II
||Protected against spraying water
||Water resistant type III
||Protected against splashing water
||Water resistant type IV
||Protected against water jets
||Water resistant type V
||Protected against powerful water jets
||Water resistant type VI
||Protected against the effects of temporary immersion in water
||Life waterproof type
||Protected against the effects of continuous immersion in water
- Battery life
The battery life of portable lights using LEDs and portable lights using bulbs are defined as follows by the SBA standards of the Battery Association of Japan.
|Portable lights using LEDs
||When the current in an LED falls below 1/10 the battery discharge initial value
-> The LED current and its brightness are roughly proportional; therefore the battery will last until the moment when the brightness of the battery's initial value is about 1/10.
|Portable lights using bulbs
||When the closed circuit voltage falls below the number of batteries used for the portable light x0.9V
-> For example, for a portable light using four batteries, each battery will last until the closed circuit voltage falls below 3.6 V (4 x 0.9 = 3.6 V).
- Brightness performance indication
The SBA standards of the Battery Association of Japan recommend displaying "luminance (lx)," "total luminous flux (lm)," and "beam distance" for brightness.
Please refer to SBA S 1601
for more information on test/indication methods for each.
(BAJ literature purchase required.)