A.1 Definition of terms - Stadium Infrastructure

UEFA Stadium Infrastructure Regulations

FT_ContentType_custom
Technical Regulations
FT_Category_Only_Custom
Specific Regulations
FT_Competition
Stadium Infrastructure
EnforcementDate
1 May 2018
A.1.1

Horizontal illuminance

Illuminance falling on a horizontal plane 1m above and parallel to the playing surface.

Vertical illuminance

Illuminance falling on a vertical plane 1m above and perpendicular to the playing surface.

Uniformity

The uniformity of illuminance in terms of how evenly light is distributed over a given reference plane. The uniformity of illuminance is expressed using two illuminance ratios: U1 and U2.

U1

The total illuminance range, from minimum to maximum, that a person or camera will be exposed to. The U1 value contributes to visual performance.

U2

The difference between a person’s normal adapted exposure and the lowest illuminance level on the given plane. The U2 value contributes to visual comfort.

Lux

The unit of illuminance incident on a pitch surface (1lx = 1lm/m2).

E

The quantity of light falling on a surface at a given point, measured in lux.