You searched for: “lygophobia
lygophobia (s) (noun) (no plural)
A loathing of darkness or of gloomy and shadowy situations: Lygophobia describes the fear of blackness, dimness, or of murkiness and is associated with feelings of uncertainty, helplessness, and the inability to see what one is doing, as well as a sense of unfamiliarity because things appear to be different in the dark.