All matches must be played under floodlights. The average level of horizontal illuminance must be at least 1,400 Eh (lux) and the uniformity ratios must be U1 > 0.5 and U2 > 0.7. The average level of vertical illuminance must be at least 1,000 Ev (lux) and the uniformity ratios must be U1 > 0.4 and U2 > 0.5. Associations must ensure that floodlighting installations are maintained and provide UEFA with a valid lighting certificate issued within the previous 12 months. UEFA may conduct an independent assessment of lighting levels in stadiums and will notify the associations in good time of the results of such assessments and of any corrections to be made. All glare ratings (RG) must be less than 50. The pitch illuminance levels should have a colour rendering (Ra) of at least 80.
Associations must ensure that floodlighting installations are maintained and provide UEFA with a valid lighting certificate issued within the previous 12 months. UEFA may conduct an independent assessment of lighting levels in stadiums and will notify the associations in good time of the results of such assessments and of any corrections to be made.
Full floodlighting must be provided for training sessions the day before the match and from two hours before kick-off, unless it is required earlier for operational purposes (e.g. calibration of goal-line technology). Furthermore, the use of LED floodlight entertainment (light show) may be permitted according to the principles determined in the UEFA Stadium Entertainment Lighting Guide. Any such use may only take place either before the warm-up, between the warm-up and the players leaving the tunnel for the match, or after the match. Any exceptions may be agreed with UEFA in specific circumstances (e.g. during a moment of silence).