The amount of light is governed mainly by Title 8, Section 3317 – Cal-OSHA.  The minimum amount is half  (.5 or 1/2) a foot-candle.  This amount varies based on the location of the work being performed. For more information on the topic, see these links: http://www.dir.ca.gov/Title8/3317.html In addition, the Human Factor Design Factors Book 2nd Read more about How much light is required in the workplace?[…]