Glossary
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Ignitor

Required in addition to a ballast for operating metal vapour lamps.

immediate pigmentation

Immediate pigmentation is a skin color which appears immediately after a minimum dose. It disappears, depending on the dose, within minutes to a few days.
Behind this is an oxidative process on already existing pigments in the skin. This process is stimulated by the irradiation. If the pigments are not or not yet produced no immediate pigmentation takes place.

Infrared radiation

Part of the electromagnetic spectrum that lies between visible light and microwaves and is not visible to the human eye, but you can feel its warming effect.

Irradiance

It is the ratio between the incoming radiation on an area and the size of this area (in W/m²). It is suitable to describe the radiation exposure on surfaces.