Matches may be played in daylight or under floodlights. For matches played under floodlights, the illuminance must correspond to the requirements set out in paragraph 16.01 of the UEFA Stadium Infrastructure Regulations for the relevant stadium category in accordance with Paragraph 29.01 of these regulations.
Clubs must ensure that the stadium floodlight system is regularly maintained to meet the minimum illuminance values as outlined in the UEFA Stadium Infrastructure Regulations.UEFA may conduct an independent assessment of lighting levels in stadiums and will notify the clubs in good time of the results of such assessments and of any corrections to be made.
For matches played under floodlights, 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. Exceptions may be agreed with UEFA in specific circumstances (e.g. during a moment of silence).