Welders can be exposed to UVA, UVB and UVC in their work. Other sources of UV light in the workplace include photocopying machines, slide projector lights and TV studio lights. The case for white fluorescent lights provoking LE is not well documented but may occur in rare instances. Sometimes trauma or injury to the skin may lead to the Koebner phenomenon where the skin reacts by producing LE lesions in the area of injury. Many factors contribute to photoprotection which is the ability of your skin to protect itself from damaging sun rays.
Skin type is an important consideration.
There are six classifications of sun-reactive skin types. Types 5 and 6 contain larger quantities of melanin, a substance which darkens the pigment of the skin and has some sun protective properties. Blacks and Asians tolerate more sun, but can also experience photosensitivity. No matter what skin type an individual may have, precautions should always be taken. Factors affecting the intensity of UV rays must also be considered.