When asked who invented the electric light bulb, most people say Thomas Edison...

This simply is not true. 

In 1868, eleven years before Edison patented his version of the light bulb, Moses Farmer, with a dynamo of his own invention, illuminated a room of his house (in Salem Massachusetts) for several months--this was the first known case of domestic incandescent lighting.

Moses is probably most famous for developing and patenting (with William F. Channing) the first electric fire alarm system, installed in 1852 in Boston, Massachusetts.

Moses Gerrish Farmer, son of Col. John and Sally (Gerrish) Farmer was born in Boscawen, NH, 9 February 1820. He attended Phillips Academy, Andover MA in the autumn of 1837. He entered Dartmouth College in 1840 remaining there three years, leaving on account of ill health. The degree of A.M. was later conferred upon him by the faculty of Dartmouth in 1853. He married 25 Dec 1844 to Miss Hannah T. Shapleigh, dau of Richard Shapleigh of Berwick Maine. He removed to Elliot ME where he was preceptor of the Academy there, and later to a similar job at Belknap School in Dover New Hampshire.  In the December of 1847 he moved to Framingham MA to be closer to his work. In July 1848 he moved to Salem, Massachusetts. In Oct 1872 he accepted the professorship of electrical science a the U.S. Naval Torpedo Station, established in 1869 in Newport, Rhode Island, for the instruction of officers of the navy in electricity and chemistry, as applied to the arts of war.  He died in Chicago, IL on May 25, 1893. [An article about his wife and daughter will be posted at a later date]. 

Highlights & Accomplishments: He helped build and maintain some of the pioneer telegraph lines of Massachusetts and experimented in multiple telegraphy. He exhibited (1847) an electric train that carried children, invented a process for electroplating aluminum, and installed (1851) in Boston the first electric fire-alarm service in any city. His later years were spent chiefly in developing the incandescent electric light. Twenty years before Edison's success he produced (1858-59) electric lamps, and in 1868, with a dynamo of his own invention, he illuminated a room of his house (in Salem) for several months--first first known case of domestic incandescent lighting. He is probably most famous for developing and patenting (with William F. Channing) the first electric fire alarm system in Boston, Massachusetts (installed in 1852).

Additional Experiments: These began in 1845 when he invented an electro-magnetic engine. In 1846 he constructed a small electro-magnetic locomotive, also a small railroad track, and exhibited it in various towns and cities with accompanying lectures, and demonstrating how the principle could be used with torpedoes and sub-marine blasting. At his first lecture in Dover, New Hampshire, he below up a miniature ship, placed in a washbowl of water, using electricity. In 1846 he invented the hook or sickle-shaped climber for the use of telephone line repairers, in climbing poles. In 1859 he created an electro-magnetic clock. He was adept in electro-metallurgy, and in 1855 he successfully deposited aluminum form its chloride solution (the first to do so). He continually improved and upgraded the telegraph process. In 1852-3 he made many experiments upon rheostates, voltomerts and magnetometers. In 1853 he received a patent on an improved porous cell for galvanic batteries.

If you learn one thing today, it is that several people invented light bulbs before Edison did, including one genius inventor, Moses Gerrish Farmer of New Hampshire.

Additional reading:

-A Short Story of the Electric Light-

--GENEALOGY OF MOSES GERRISH FARMER--

John-1 Farmer of Ansley, probably son of John; married Isabella Barbage of Great Parkinston. He died in Ansley in 1669. His widow, Isabella, came to Massachusetts with some of her children, and settled in Billerica MA. She subsequently m. Elder Thomas Wiswall of Cambridge, now Newton MA. She d. in Billerica, Dec 1683, very aged.
Children of John & Isabella (Barbage) Farmer:
1. +Edward Farmer, b. 1741 Ansley England.

Edward-2 Farmer (John-1) b. at Ansley, England in 1741; came to Massachusetts  1670-1673; settled in Billerica MA; admitted to town privileges 11 Jan 1673. He lived a short time in Woburn MA; held offices of trust and honor. He married Mary --. He died in Billerica MA 27 May 1727, aged 86. His homestead remained in the family for several generations.
Children of Edward & Mary (?) Farmer:
1. Sarah Farmer, b. England; m. her cousin Thomas Pollard of Coventry, England, who came to Billerica MA. She d. 3 May 1725.
2. John Farmer, b. 19 Aug 1671; m. Abigail --; d. 9 Sep 1736
3. Edward Farmer, b. 22 March 1674; m. Mary Richardson; d. 17 Dec 1752
4. Mary Farmer, b. 3 Nov 1675
5. Barberry Farmer, b. 26 Jan 1677
6. Elizabeth Farmer, b. 17 May 1680; m. William Green of Malden MA
7. Thomas Farmer, b. 8 Jan 1683; m. Sarah Hunt; d. in Hollis NH 1767.
8. +Oliver Farmer, b. 2 Feb 1686; m. Abigail Johnson

Oliver-3 Farmer (Edward-2, John-1) was born 2 Feb 1686; m. Abigail Johnson of Woburn MA. He d. 23 Feb 1761 at Billerica MA.
Children of Oliver & Abigail (Johnson) Farmer:
1. Abigail Farmer, b. 22 Dec 1717, d. 1718
2. Abigail Farmer (2d) b. 1719; m. Jonathan Richardson of Billerica MA
3. Mary Farmer, b. 26 Aug 1872; m. William Baldwin of Billerica MA; d. Sep 1803
4. Sarah Farmer, twin, b. 14 Dec 1723; m. Edward Jewett of Rowley MA; d. 1819
5. Rebecca Farmer, twin, b. 14 Dec 1723; m. Samuel Rogers of Billerica MA; d. 30 Aug 1809
6. Oliver Farmer, b. 31 July 1728
7. Isabella Farmer, b. 2 March 1731; m. Benjamin Warren of Billerica MA; d. 23 Feb 1761
8. Edward Farmer, b. 24 Feb 1734; m. Sarah Brown; d. 19 Aug 1811
9. +John Farmer, b. 7 Dec 1737; m1) Hannah Davis; m2) Mrs. Sarah (Russell) Adams

John-4 Farmer (Oliver-3, Edward-2, John-1) Was b. 7 Dec 1737; m1st) Hannah Davis; m2nd Mrs. Sarah (Russell) (Bowers) Adams. She was born in Dracut MA. Upon the death of her third husband, John Farmer, she came to Boscawen with her children to be near children by her first marriage, and who resided in Boscawen. She lived to the age of 95. She died in Pembroke NH in March of 1846.
Children of John & Hannah (Davis) Farmer:
1. Hannah Farmer
2. Rebecca Farmer
3. Abigail Farmer
4. Polly Farmer
5. John Farmer
6. Lucy Farmer
Children of John & Sarah (Russell) Farmer:
7. +John (Col.) Farmer, b. 11 Dec 1791; m. Sally Gerrish
8. Hannah Farmer, b. 15 Dec 1794; m. Bliss Corser of Boscawen. She d. 4 Feb 1852 in Portage NY

Col. John-5 Farmer (John-4., Oliver-3, Edward-2, John-1) was born 11 Dec 1791; he m. 11 Feb 1819 Sally Gerrish, dau of Moses Gerrish of Boscawen NH. He died 17 July 1836.
Children of Col. John & Sally (Gerrish) Farmer:
1. +Moses Gerrish Farmer, Professor, b. 9 Feb 1820; m. Hannah T. Shapleigh
2. Page French Farmer, b. 28 June 1821; d. 27 July 1822
3. John Page Farmer, b. 24 Sep 1823; m. Martha Locke, Great Falls; resided Minnesota; had children: John Quincy (b 1848, d. 1857), Martha Jane (b 1851, d. 1857), Mary White (b 22 March 1853), Charles Russell (b 11 March 1855)
4. Sallie Russell Farmer, b. 30 Aug 1826; m. Charles C. Coffin; resided in Boston; d. 20 June 1910
5. Jane Gray Farmer, b. 7 June 1828, twin; m. Ephraim Little of Webster NH, d. 27 June 1867
6. Jeremiah Otis Farmer, b. 7 June 1828, twin; d. 6 Dec 1828

Moses Gerrish Farmer, son of Col. John and Sally (Gerrish) Farmer was born in Boscawen, NH, 9 February 1820. He married 25 Dec 1844 to Miss Hannah T. Shapleigh, dau of Richard Shapleigh of Berwick Maine. He died in Chicago, IL on May 25, 1893.
Children of Moses G. & Hannah T. (Shapleigh) Farmer:
1. Sarah Jane Farmer, b. 22 July 1847 in Dover NH
2. Clarence Farmer, b. 26 May 1860; d. 27 May 1860.