photoallergy

https://doi.org/10.1351/goldbook.13568
Type IV hypersensitivity reaction in which photoactivation of a substance produces a hapten that then acts as a sensitizer.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1228 [Terms] [Paper]