scope:

This Japanese Industrial Standard specifies the methods for measuring the luminous intensity distributions and luminous flux of general purpose luminaires incorporating electric light sources (incandescent lamps, fluorescent lamps, other discharge lamps and electroluminescent devices such as an LED).

If a specific luminaire product standard specifies other measurement methods than given in this Standard, those methods shall apply.

The "general purpose luminaires" for the purpose of this scope do not include the following. However, this Standard may be applied to luminaires or light sources other than general purpose luminaires where applicability is recognized.

a) Luminaires used underwater

b) Luminaires for emergency exit sign in accordance with the Fire Service Act

c) Luminaires for takeoff and landing of airplanes and obstacle light luminaires