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Spectra

The energy distribution for most types of
UVH lamps are as follows (approximate values):

30% UV radiation - 15% visible light - 55% infrared (heat)

Depending on the filling of the lamp, whether only mercury or also with iron or gallium or other additives, the radiation peaks shift to different wavelengths. Due to this, the proportions of UV-A, UV-B and UV-C change relative to one another. The three most commonly used UVH lamp types emit a mercury, iron or gallium spectrum.

Spectrum of a mercury lamp (UVH standard); energy distribution (approximate values): 15% UV-C, 8% UV-B, 7% UV-A, in relation to the electrical power.

Spectrum of an iron-doped lamp (UVH type F); energy distribution (approximate values): 7% UV-C, 5% UV-B, 17% UV-A, in relation to the electrical power.

Spectrum of a gallium-doped lamp (UVH type G); energy distribution (approximate values): 9% UV-C, 8% UV-B, 4% UV-A, 24% UV-VIS, in relation to the electrical power.