Recommended levels of illumination
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/1979

Calibration and testing laboratory accreditation systems -- General requirements for operation and recognition
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/1996

Classification of fluorescent lamps and light emitting diodes by chromaticity and colour rendering property
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2019