If the stadium design or existing installation requires luminaires to be positioned within a lateral distance of less than 20˚ perpendicular to the perimeter of the pitch, or if the vertical illuminance requires improvement, a second linear row of luminaires may be required. The optimum angle for a second linear row of luminaires is generally 25°–30° for the majority of stadiums. However, the optimum position of the luminaires should be evaluated in conjunction with the existing installation or the whole design proposal.
The diagram above shows that a luminaire installed at a height of 24m requires a lateral distance of no less than 8.7m from the pitch perimeter.