Exposure to solar radiation is hazardous for human health and causes skin cancer, photodermatoses and eye disorders. The main health benefit of ultraviolet radiation (UVR) is vitamin D synthesis, however oral supplementation is a safer alternative. Solar radiation reaching the earth’s surface contains UVB (280-315nm), UVA (315-400nm), visible light (VL: 400-780nm), and infrared radiation (780nm-1mm). UVR accounts for almost 8% of solar radiation (5% UVB, 95% UVA). The light dose received is influenced by altitude, latitude, time of day, weather, season and reflection from surrounding surfaces.
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