Znaczenie słówka photoirradiation

https://www.diki.pl/slownik-angielskiego/?langpair=en%3A%3Apl&q=irradiation&x=0&y=0

Irradiation to naświetlenie.

Sądzę że chodzi o fotograficzne naświetlenie :P (może o klisze, błonę fotograficzną )

Irradiation- j.w.-Naświetlanie, napromienianie, napromieniowanie
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Blue Light Destroys Antibiotic-Resistant Staph Infection

New Rochelle, NY, January 29, 2009—Two common strains of methicillin-resistant Staphylococcus aureus, commonly known as MRSA, were virtually eradicated in the laboratory by exposing them to a wavelength of blue light, in a process called photo-irradiation that is described in a paper published online ahead of