The degree of glare produced by the luminaire depends on the density of the luminaire, the direction of projection, the quantity, the location of the viewing in the arena, the brightness of the environment, and the like.
In fact, the number of fixtures and auditorium on the number of related to the size of soccer field. Relatively speaking, the training ground can simply install a simple lamp; and large stadiums to install more lamps, by controlling the light beam, in order to achieve high illumination, low glare purposes.
In addition to glare to athletes and spectators, sport field lighting fixtures also produce glare outside the stadium. But do not shine light on the football pitch or the roads or neighborhoods surrounding the stadium.