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
Royal Society of Literature The list is online at the RSL website. Royal Society of Literature The Royal Society of Literature (RSL) is a learned society founded in 1820, by King George IV, to 'reward literary merit and excite literary talent'. The society is a cultural tenant at London's Somerset House. The society's first president was Thomas Burgess, Bishop of St David's (who was later translated as Bishop of Salisbury). The society maintains its current level of about 500 Fellows of the Royal Society of Literature: generally 14 new fellows are elected annually, who are accorded the privilege of using the post-nominal letters FRSL.