Certain parts of the body are resonant at various frequencies in this range. Prolonged exposure to these vibration forces in these frequency ranges may create chronic stresses and sometimes even permanent damage to the affected organs or body parts. Lighting Lighting in one workstation may be appropriate, but for another workstation, that same lighting may be potentially harmful. Illumination may be too high, too low, or cause glare. Illumination levels above 1000 lux present such problems in the office environment.
Outside lighting is an important factor to consider.
Light for outside work should aid production and, at the same time, be high enough to be safe. Adequate general and local lighting must be provided for rooms, building and work areas during the time of use. The quality of light in terms of freedom from glare, and correct direction, diffusion and distribution. Freedom from shadows and extreme contrasts. All skylights, side windows, lamps and other accessories which are necessary for illumination must be kept clean, and in working order.