According to BuidlingConservation.com, electric lighting was possible but not widely used in the Victorian era. Candles and gas lighting were primary choices throughout the 19th century. Electric lighting did not become a popular light source until after World War I.
BuildingConservation.com notes that gas lighting was still the predominant choice of the early 20th century, and that many small towns and villages still relied on oil lamps and candles. Thomas Edison was able to beat rivals by producing the first working incandescent light bulb in 1879. A year later, Cragside, a mansion located in Northumberland, England, was the first house to be powered by electricity. Electric bulbs, however, remained a relative novelty for the next several decades.