fear of darkness
Lygophobia is the fear of darkness.
lygophobia 1. An excessive fear, or panic, about being in dark places or of darkness in general. 2. An abnormal dislike of gloomy or shadowy situations. Fears of darkness are 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 differently in t...