Incandescent light bulb street in the world to be lit by an incandescent lightbulb was Mosley Street, Newcastle upon Tyne, United Kingdom. It was lit by Joseph Swan's incandescent lamp on 3 February 1879. Thomas Edison began serious research into developing a practical incandescent lamp in 1878. Edison filed his first patent application for "Improvement In Electric Lights" on 14 October 1878. After many experiments, first with carbon in the early 1880s and then with platinum and other metals, in the end Edison returned to a carbon filament. The first successful test was on 22 October 1879, and lasted 13.5 hours. Edison continued
Moscow Electric Lamp Plant and the Electrovacuum Instrument Plant in Voronezh. The Moscow Electrovacuum Instrument Plant, with its two associated special design bureaus, specializes in developing and producing a variety of vacuum tube products (photoelectric cells, xenon and mercury tubes, gas-filled and gas discharge devices, photoelectronic multipliers and others). This plant dates back to before World War II, and was known, until 1972, as the Moscow Electric Lamp Plant (MELZ). The Khromatron Plant in Moscow and the Electrovacuum Instrument Plant in Voronezh, produce mainly CRT's for color television. Moscow Electric Lamp Plant Moscow Electric Lamp Plant () is a company based in Moscow, Russia.