May be involved in non-photochemical quenching, a process that maintains the balance between dissipation and utilization of light energy to minimize generation of oxidizing molecules, thereby protecting the plant against photo-oxidative damage (By similarity). May play a photoprotective role in the thylakoid membrane in response to light stress (Probable). Present at low levels under low light conditions, but accumulates under high-intensity light. Induced by UV-A illumination. Fades out upon wounding. Belongs to the ELIP/psbS family.