Brownout and Crepuscule

Brownout noun - Darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft).

Crepuscule and brownout are semantically related in place topic. In some cases you can use "Crepuscule" instead a noun "Brownout".

Crepuscule noun - The time from when the sun begins to set to the onset of total darkness.

Brownout and crepuscule are semantically related in place topic. You can use "Brownout" instead a noun "Crepuscule".