Football
 Lighting criteria are different for college, high school, and recreational play. Stadium lighting considerations include: Proper orientations, locations, illuminances and controls that satisfy needs for any type of contingency Number of poles based on the width of the sideline Quality of cutoff or spill light control STADIUM CLASS DESIGNATIONS Class I - Facility with OVER 5,000 spectator capacity Class II - Facility with UNDER 5,000 spectator capacity Class III - Facility with SOME spectator capacity Class IV - Facility with NO spectator capacity LIGHTING OVERVIEW Horizontal illuminance - a measure of the lumens per unit area on a horizontal surface. Normally it is measured three feet above the playing surface. Uniformity illuminance - a measure of the rate of change of illuminance expressed as a ratio between the illuminance level of adjacent measuring points on a uniform grid. The limit of uniformity varies with the speed of the ball. LUX - a measure of illuminance weighted to the spectral sensitivity of the human eye. It is defined as 1 lux = 1 lumen/square meter. FC - foot-candle. The official definition is 1 foot-candle = 10.764 lux; however, it is easiest to approximate at 1 foot-candle =  10 lux.