Time when streetlights turn on

DUSK

Think of the brief period between daylight and darkness when the sky takes on a soft, dim glow and shadows lengthen. It’s often called the "glowing hour" by poets.

"Dusk" is the period of twilight just after sunset when the sky starts to darken, which is when many streetlights automatically switch on. The clue plays on this common real-world connection—cities often use light sensors to trigger streetlights at dusk. There’s no hidden wordplay here; it’s a straightforward definition linking a natural daily event to urban infrastructure. If you’ve ever noticed lights flickering on as daylight fades, you’ve seen this in action.