According to 12464-1:2011 standard the maximum luminance values for lighting fixtures that produce veiling reflections on screens (LCD) due to their position must be lower than the values indicated in the table below:

Case A refers to positive polarity flat screens with standard settings for colour and information displayed (e.g. offices, schools, etc.).

Case B refers to negative polarity flat screens and/or screens with high quality features concerning colour settings and details of the information displayed (e.g. CAD, colour inspection).

In case of a high brightness screen used with less than 200 cd m², provisions concerning medium brightness screens should be followed.

The screen brightness represents the maximum brightness of the white parts of the screen. This value is indicated by the manufacturer. Some activities, visual tasks or technologies using extremely glossy screens might require different light conditions.