Electric light by the first practical electric arc light in 1806. By the 1870s, Davy's arc lamp had been successfully commercialized, and was used to light many public spaces. The development of a steadily glowing filament suitable for interior lighting took longer, but by the early twentieth century inventors had successfully developed options, replacing the arc light with incandescents. The energy efficiency of electric lighting has increased radically since the first demonstration of arc lamps and the incandescent light bulb of the 19th century. Modern electric light sources come in a profusion of types and sizes adapted to many applications. Most modern
The Essential Electric Light Orchestra The Essential Electric Light Orchestra The Essential Electric Light Orchestra is a single CD, US-only compilation album by the Electric Light Orchestra (ELO), released in 2003. It is part of Sony Music's "The Essential" series. It was preceded by US compilations "Olé ELO" in 1976 and "" in 1995. On 2 September 2008 an eco-friendly repackage of this album called "Playlist: The Very Best of Electric Light Orchestra" was released and included a multimedia section on the CD with photos, credits and two new wallpapers. A third re-release in 2011 expanded the original album to include a second disc and