Good illumination is important to maximize production and maintain quality control.  Poor lighting on the job-site will lead to personal injury, accidents, tripping, falling and injuries from tools and equipment.  OSHA requires that all construction areas, including stairs, ramps, storage areas, shops, offices, etc. be lighted by natural or artificial illumination.  For general construction areas illumination must be equal to 5 foot candles; a foot candle being a standard unit for measuring intensity of illumination. Generally speaking, if you are able to read drawings and follow layout marks without difficulty and use cutting tools effectively and with ease, there is sufficient lighting on the site