GOST R 8.971-2019 State system for ensuring the uniformity of measurements. Light-emitting diode (LED) lamps, luminaires and modules. Methods of photometric and colorimetric characteristics measurement
1970GOST R 8.971-2019 State system for ensuring the uniformity of measurements. Light-emitting diode (LED) lamps, luminaires and modules. Methods of photometric and colorimetric characteristics measurement