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Sunlight
Sunlight is the most commonly known physical hazard which affects the people who work outside. Outdoor workers get highest sunlight exposure during high-intensity hours between 10:00 a.m. to 4:00 p.m. and during the summertime. The risk of getting sunburned is more throughout these times. Some commonly used medicines such as nonsteroidal anti-inflammatory drugs (NSAIDS), antihistamines, tetracycline, thiazides, sulfa antibiotics, and diuretics increase sensitivity to sunlight and resulting in skin rashes and sunburn. Moreover, sunlight is a source of ultraviolet (UV) rays which are the form of non-ionizing radiation. UV rays directly from sunlight and indirect sun exposure, such as light reflected by snow and light-shaded sand can penetrate worker’s uncovered skin. Long time, continuous exposure to ultraviolet radiation results in suppression of the immune system, eye damage, skin aging, and skin cancer. Some non-solar sources of UV radiation, for example, projection lamps, the curing of paints and inks, equipment disinfectant used in hospitals, fluorescent tubes, sunlamps, and welding arcs, can also cause adverse health effects in other workers.

Personal protective equipment, engineering, and administrative controls such as the provision of shade cover, and rotating job shifts can minimize the risk of sun exposure for outdoor workers. In case of non-solar sources of UV radiation, suitable engineering controls and administrative controls such as warning signs and training of employees can useful.