Glossary of Terms

E : the quantity of light upon a surface at a given point, measured in Lux.

Eh ave : the average illuminance on the horizontal plane 1m above the pitch surface, measured in Lux.

Eh max : the maximum illuminance level on the horizontal plane of the specified reference test points 1.0m above the pitch surface, measured in Lux.

Eh min: the minimum illuminance level on the horizontal plane of the specified reference test points 1.0m above the pitch surface, measured in Lux.

Ev ave : the average illuminance on the vertical plane 1m above the pitch surface, measured in Lux.

Ev 270°: the average illuminance on the vertical plane 1m above the pitch surface, measured in Lux.

Ecam ave : the illuminance value on the given vertical plane of the specified reference test point 1.0m above the pitch surface, measured in Lux

Ev4 (4 point ave): the average illuminance of the 4 vertical planes at a given point on the vertical plane 1.0m above the pitch surface, measured in Lux.

Ev4-96 min(4 point min): the minimum illuminance value of Ev4 (4 point ave) at any of the  96 reference points.

Ev4-96 max(4 point max): the maximum illuminance value of Ev4 (4 point ave) at any of the  96 reference points.

Ev4-96 ave(4 point ave): the average illuminance value of  Ev4(4 point ave) of the 96 reference points.  Calculated by making the sum of the Ev4 (4 point ave) for all 96 reference points and dividing by 96, measured in Lux.

Ev 270° ave: the average illuminance in the given vertical plane (in this case 270°) of the specified reference test points1.0m above the pitch surface, measured in Lux.  Calculated by making the sum of the Ev270°  for all 96 reference points and dividing by 96.

Ev 0° maxthe maximum illuminance level in the given vertical plane of the specified reference test points 1.0m above the pitch surface, measured in Lux.

Ev 180° minthe minimum illuminance level  in the given vertical plane of the specified reference test points 1.0m above the pitch surface, measured in Lux.

Ecam ave: the average illuminance towards the main camera of the specified reference test points 1.0m above the pitch, measured in Lux.

Lux : the unit of illuminance in lumen/m2. 1 Lux = 1 lumen/m2

Lumen : the luminous flux of a light source, measured in Lumens (symbol lm).

Ra : the colour rendering index. The quality of colour reproduction produced by a light source as compared to natural daylight conditions, on a scale of Ra0 to Ra100.

Tk : the colour temperature of a light source measured in kelvins (K).

FF: the modulation of luminance on a given plane during a complete cycle expressed as a percentage of the relation between the maximum luminance value and minimum luminance value during a full cycle.

GR : the glare rating, the degree of discomfort caused by the illuminance system to a person on the pitch.

U1h : a measure of horizontal illuminance uniformity. The ratio of minimum illuminance to maximum illuminance in the given plane of all 96 horizontal illuminance points.

U2h : a measure of horizontal illuminance uniformity. The ratio of minimum illuminance to average illuminance in the given plane of all 96 horizontal illuminance points.

U1v : a measure of vertical illuminance uniformity. The ratio of minimum illuminance to maximum illuminance in all 384 vertical illuminance points.

U2v : a measure of vertical illuminance uniformity. The ratio of minimum illuminance to average illuminance in all 384 vertical illuminance points.

U1v (4-96 point): a measure of vertical illuminance and illuminance modelling uniformity. The ratio of Ev4 (4 point min) minimum illuminance to Ev4 (4 point max) maximum illuminance of all 96 reference points vertical illuminance points.

U2v (4-96 point): a measure of vertical illuminance and illuminance modelling uniformity. The ratio of Ev4 (4 point min) minimum illuminance to Ev4 (4 point ave) average illuminance of all 96 reference points vertical illuminance points.

U1v-270°: a measure of vertical illuminance uniformity on the 270° plane. The ratio of minimum illuminance to maximum illuminance in all 96 vertical illuminance points.

U2v-270°: a measure of vertical illuminance uniformity on the 270° plane.  The ratio of minimum illuminance to average illuminance in all 96 vertical illuminance points.

MAUR: Minimum Adjacent Uniformity Ratio.  Any two adjacent points on any given plane in any direction should have a difference no greater than the permitted ratio between the two points as stated in the relevant UEFA Illuminance category using the MAUR reference.

MF : Maintenance Factor. A factor used to calculate the depreciation in a lamp and luminaire performance.

UPS : Uninterruptible Power Supply. A power system to provide instantaneous power by means of energy normally stored in batteries in the case of failure to the primary power source.

Main Camera Side : This indicates the plane of the main camera position for a television broadcast.  The main TV camera will be positioned on the TV camera gantry.  This location is used within the report to ensure the pitch orientation is correct and consistent for all stadiums.  The Main Camera Side is also referred to as the 270° plane when looking at the orientation of the plans and referring to the data.

Main Camera Position: This indicates the position of the main camera for a television broadcast.  The main TV camera will be positioned on the TV camera gantry.  This location is used within the report to ensure the pitch orientation is correct and consistent for all stadiums.

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