Crepuscular and Unlit

Crepuscular adjective - Like twilight; dim.

Unlit and crepuscular are semantically related in dark topic. In some cases you can use "Unlit" instead an adjective "Crepuscular", when it comes to topics like lack of light.

Unlit adjective - Being without light or without much light.

Crepuscular and unlit are semantically related in dark topic. You can use "Crepuscular" instead an adjective "Unlit", if it concerns topics such as lack of light.