valoherkkien

Valoherkkien is a Finnish genitive plural form of the adjective valoherkkä, meaning light-sensitive. The basic meaning of valoherkkä is “sensitive to light,” referring to people, objects, or phenomena that react to light, or that require specific light conditions. The genitive plural valoherkkien is used when talking about several light-sensitive entities or when indicating possession or association with such entities.

In practice, you will see phrases such as valoherkkien laitteiden säätö (adjustment of light-sensitive devices), valoherkkien kasvien valaistus (lighting for light-sensitive plants), or valoherkkien potilaiden hoito (care of patients who are sensitive to light). The term is most common in technical or scientific texts, but it can appear in medical and industrial contexts as well.

In biology, valoherkkien organisms may describe species that rely on light for behavior or physiology, such as photoreceptors. In materials science, valoherkkien materials are those whose properties change under illumination, for example through photochemical reactions or photodegradation. In everyday Finnish, speakers may instead use phrases like valoon reagoiva or valoherkkyys to express related ideas.