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 Watercolour Society well as talks and discussions. The archive and diploma collection is available for research. Current members include Sonia Lawson, Elizabeth Blackadder and David Remfry. The current president Jill Leman was elected in 2017. Royal Watercolour Society The Royal Watercolour Society (originally called the Society of Painters in Water Colours, briefly the Society of Painters in Oil and Watercolours, and for much of its existence the Royal Society of Painters in Water Colours) is an English institution of painters working in watercolours. The Royal Watercolour Society is a centre of excellence for water-based media on paper, which allows for a diverse