Lights

Devices that create light.

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T is for Torch

A torch is a tool used for light, often a stick with oil-soaked rags wrapped around one end and set alight, and a place to carry it on the other end.
A traffic light or traffic signal is a set of three lights that is used to control the flow of traffic at an intersection.
A green light means you can go, an orange or amber light means you need to be ready to stop, and a red light means you need to stop.