This standard specifies the use of illuminance meter method to measure the illuminance of public places. This standard applies to the determination of artificial lighting illuminance and day and night illuminance in public places, and also applies to the determination of screen brightness and luminous flux.
GB/T 18204.21-2000 history
2013GB/T 18204.1-2013 Examination methods for public places.Part 1:Physical parameters
2000GB/T 18204.21-2000 Method for determination of illumination in public places
GB/T 18204.21-2000 was changed to GB/T 18204.1-2013 Examination methods for public places.Part 1:Physical parameters.