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Portable light performance


Degree of protection against water

JIS C 0920 / IEC 60529 SBA standard
IP Code Brief description Waterproof level
IPX0 Non -protected
IPX1 Protected against vertical falling water drops Water resistant type I
IPX2 Protected against vertically falling water drops when enclosure tilted up to 15° Water resistant type II
IPX3 Protected against spraying water Water resistant type III
IPX4 Protected against splashing water Water resistant type IV
IPX5 Protected against water jets Water resistant type V
IPX6 Protected against powerful water jets Water resistant type VI
IPX7 Protected against the effects of temporary immersion in water Life waterproof type
IPX8 Protected against the effects of continuous immersion in water Submersible type

- 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.)