TABLE 1.

Detrimental effects of visible light

Inflammatory responses	Generation of reactive oxygen and nitrogen species Increased proinflammatory cytokines and activation of matrix metalloproteinases Indirect DNA damage Damage to the skin barrier function
Melanogenesis	Induction of immediate and prolonged pigmentation in dark‐skinned individuals* Exacerbation of preexisting hyperpigmentation/melasma
Vascular	Dilatation of vessels of the subpapillary plexus, and induction of erythema
Aggravation of photoinduced disorders	Solar urticaria, polymorphous light eruption, cutaneous porphyrias and chronic actinic dermatitis

*Fitzpatrick skin phototypes III to VI.