valokytkin
A valokytkin, meaning "light switch" in Finnish, is an electrical component used to control the flow of electricity to a light fixture. It is typically operated by hand, with a toggle, rocker, or push-button mechanism that opens or closes an electrical circuit. When the circuit is closed, electricity flows, and the light turns on. When the circuit is opened, the flow of electricity is interrupted, and the light turns off.
Valokytkimet are commonly found in homes, offices, and public buildings, installed on walls near the entrance
Modern valokytkimet can also incorporate additional features like dimmers, which allow for adjustable light intensity, or