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In non-residential buildings, "built-in lighting" is the lighting which contributes to general lighting [1] in the room by means of fixed or portable luminaires in accordance with the intended purpose of the room in accordance with applicable standards (e.g. EN 12464-1, EN 12193) or national technical regulations for workplaces.

The term "built-in lighting" is used in the European EPBD (Energy performance of Buildings Directive) to describe built-in lighting. The definition of "built-in lighting" for non-residential buildings can be derived from the lighting terms for general lighting [1] and local lighting [2] laid down in EN 12665.

1]: General lighting (EN 12665:2018-08, point 3.5.1): essentially uniform lighting of a room without taking into account the special requirements of individual parts of the room.

2] local lighting (EN 12665, point 3.5.3): Illumination of a special visual task that is used in addition to general lighting and can be switched separately from it.

In addition, the definition of "built-in lighting" is based on the other definitions in EN 12665:2018, e.g. points 3.5.7 - direct lighting and 3.5.11 - indirect lighting.

Built-in" lighting in non-residential buildings therefore includes not only surface-mounted ceiling luminaires and recessed ceiling luminaires but also in particular the components of free-standing and table luminaires, each of which has a significant and in the majority of applications exclusive influence on general lighting via their indirect radiation component.

Direct components of free-standing and table luminaires which illuminate only a very small part of the room, e.g. a small work surface as additional direct lighting, are not affected as they do not make a significant contribution to general lighting.