Lighting Levels

TYPE OF ACTIVITY SUGGESTED LEVELS
(FOOT CANDLE)
Public spaces with dark surroundings3
Simple orientation for short temporary visits7
Working spaces where visual tasks are only occasionally performed15
Performance of visual tasks of high contrast or large size35
Performance of visual tasks of medium contrast or small size75
Performance of visual tasks of low contrast or very small size150
Performance of visual tasks of low contrast and very small size over a long prolonged period300
Performance of very prolonged and exacting visual tasks750
Performance of very special visual tasks of extremely low contrast and small size1500