nyctophiliac means A nyctophile, a person who loves the night or darkness. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “nyctophiliac” is a great word
NYCTOPHILIAC — [Noun] A person who loves the night or darkness. From the Greek nykt- ("night") and -philiac ("one who loves or has an affinity for"). Unlike a noctambulist, who sleepwalks, or a noctivagant, who merely wanders after dark, the nyctophiliac is drawn by a conscious, psychological devotion to the absence of day. It is the quiet exhalation felt when streetlamps gutter out, the intimate enclosure of a room lit only by a single desk lamp, and the profound privacy of watching a city's windows go dark one by one—a deliberate allegiance to the world when it is most itself and least observed.
Etymology
From nycto- + -philiac.
noun
- A nyctophile, a person who loves the night or darkness.“He was a nyctophiliac; he found peace in the darkness and couldn't bear the weight of the light, putting him on the spot, revealing how he was nothing now.”