When did people start using parallel circuits for lights?

Parallel circuits for lights began to gain popularity in the late 19th century, particularly after the introduction of electric lighting systems. Thomas Edison’s development of the first practical incandescent light bulb in 1879, along with advancements in electrical distribution systems, facilitated the use of parallel circuits. By the 1880s, parallel wiring became the standard for electrical installations, allowing multiple lights to operate independently and improving reliability and safety.