lights
n. countable A1 Beginner US //ˈɫaɪts// UK //lˈaɪts// lights
n. equipment that uses electricity to make a room or area bright so you can see. You turn them on when it gets dark.
n. devices that produce illumination, typically through electricity, to make an environment visible. Often used in the plural to refer to the collective lighting system of a room or vehicle.
Please turn off the lights when you leave the room.
The city lights looked beautiful from the top of the hill as the sun began to set.
The stage lights dimmed slowly, signaling to the audience that the final act of the play was about to commence.
Usage
Commonly used in the plural when referring to the fixtures in a room or the headlamps of a car.