Nub’s Nob

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 Range
• Quality of cutoff or spill light control

• 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

• 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