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
Heinrich Göbel of the lamps and the method of production. Witnesses of the "Goebel-Defense" said, that reproduced lamps burnt 45, 87 and 166 hours. Edison's lamps burnt at time of applying for a patent approximately 40 hours. So-called "Goebel Original Lamps" were broken in 1893. Experts of the Edison side said that they never burnt. Lewis Latimer, an employee of the "Edison Electric Light Co." and responsible to support their counsels, discredited Goebel by demonstrating that his supposed 1870s bulb (Goebel Lamp No. 4) had been built much later. Professor van der Weyde, an 80 years old physicist, said in his affidavit,