Yesterday I posted about the early part of the 19th century and specifically the oil lamps. In addition to oil lamps there were gas lights and electric lights. Below is an outline of the history of electric lamps throughout the century.
1801 First electric arc lamp was invented in England by Sir Humphrey Davy.
1854 First true lightbulb invented by Henricg Globel of Germany
1857 Fluorescent lamp was introduced in France by A.E. Becquerel
1875 Henry Woodward and Matthew Evans patented a lightbulb.
1879 Thomas Edison improved the incandescent light
1880 Edison's patent was granted.
Practically speaking you won't have electric lamps in the homes of your characters set prior to the 1880's. Another interesting texture to oil and gas lamps is the smell, keep that in mind when writing as well. Remember to use the five senses when describing what your characters are experiencing.