Solar energy is a form of electromagnetic radiation. All forms of solar energy can be expressed as a wavelength, which is the measure of the length of a full cycle in a repeating electromagnetic curve. The solar energy that enters into the earth's atmosphere is split into three bands by wavelengths; the ultraviolet (UV), visible (VIS) and infrared (IR) bands.

The UV Band: is measured between 100-400 Nanometers and are the wavelengths most responsible for fading or sun damage to carpets, drapes, fabrics, upholstery, etc. The UV band is the one that tans the skin and can also contribute to certain types of medical problems when over exposed, such as certain types of skin cancers. The UV band accounts for 3% of the solar spectrum.

The Visible Band: is measured from 380-780 Nanometers. This is the only part of the solar spectrum actually seen with our eyes and is the most intense in the entire solar spectrum. The visible band accounts for 44% of the solar spectrum.


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