Known effects and their likely causes

The following is a list of symptoms and diseases known to be linked to exposure to fluorescent lighting:

• Headache, eyestrain, eye irritation, fatigue, difficulty in concentration, increased rate of ‘misjudgments’ and accidents, malaise and irritability can be caused by noise, glare and flicker from fluorescent lighting.

• Increased stress (which may in turn lead to heart disease) can arise from increasing the intensity of artificial light with fluorescent tubes. It has been shown that increased use of artificial light (rather than natural light) affects the levels of hormones in the body, particularly the hormones associated with stress, such as cortisol.

• Variation in brightness, as provided by daylight, is necessary for the normal functioning of the body’s rhythms. The monotonous illumination of fluorescent lighting may also add to the changes in hormone production.

• Allergic skin reactions and dermatitis can be caused by exposure to fluorescent lights. An unknown number of people suffer from ‘cutaneous light sensitivity’ due to fluorescent lights. This means that not only can they become allergic to fluorescent lighting but they can become more sensitive to ordinary sunlight.

• Certain long-term, mild skin diseases can become worse if the sufferer is exposed to fluorescent light. Some medical drugs (including some tranquilizers, antibiotics, heart drugs and diuretics) can make you particularly sensitive to UV radiation (photosensitivity). Skin eruptions then occur even with the small doses of UV (in the 300-320nm wavelength range) emitted by white fluorescent lights.

• Hyperactivity has been linked to the flickering produced by fluorescent lighting. Microwave emissions from fluorescent lighting are also suspected of contributing to these behavioral disorders. Other mild behavioral disorders in children may be made worse by working at school under fluorescent lighting.

There is also some evidence that the following effects may be caused by exposure to fluorescent lights:

• Increased risk of seizure in epilepsy sufferers

• Higher incidence of miscarriage

• Speeding up the aging of the retina.