15 Festive Facts About Christmas Lights

Merry and bright Christmas lights.
Merry and bright Christmas lights. / Lvan Davidovic/EyeEm Premium/Getty Images

The Christmas tree may have German roots, but the twinkling lights adorning them each December are distinctly American. From Thomas Edison’s ingenious marketing strategy to Carson Williams’ viral “Wizards of Winter” display, here are some facts about fairy lights to keep you warm throughout the season.

1. Thomas Edison was responsible for the first Christmas light display.

Determined to make good on his promise to electrify downtown Manhattan, Thomas Edison sought to draw attention to his incandescent light bulb during the 1880 Christmas season. The Wizard of Menlo Park, who was known for his PR savvy, laid eight miles of underground wire to power strings of lights around the outside of his New Jersey laboratory. Train commuters traveling between New York and Philadelphia were so amazed by the glowing fields that one reporter labeled Edison “the Enchanter” and described the spectacle as “a fairy-land of lights.”

2. Edison’s colleague Edward H. Johnson created the first electrically illuminated Christmas tree.

Just two years later in 1882, Edison set up a central power plant on Pearl Street in Manhattan. That holiday season, his friend and colleague Edward H. Johnson decorated the first Christmas tree with 80 blinking red, white, and blue electric lights at his home on Fifth Avenue. To add to the historic presentation, Johnson’s tree sat atop a revolving box that spun every 10 seconds. Documenting the amazing display, a reporter from the Detroit Post and Tribune wrote, “I need not tell you that the scintillating evergreen was a pretty sight—one can hardly imagine anything prettier … The tree was kept revolving by a little hidden crank below the floor which was turned by electricity. It was a superb exhibition.”

3. Grover Cleveland was the first president to have a Christmas tree decked out in electric bulbs.

Benjamin Harrison was the first to have a Christmas tree in the White House in 1889, but it wasn’t until 1895—four years after the White House was wired with electricity—that Grover Cleveland requested the first family’s tree be adorned with hundreds of multi-colored bulbs. The 22nd and 24th president is credited with warming the public to the idea of electric Christmas lights. At the time, many people mistrusted electricity and thought that dangerous vapors would seep into their homes through the lights and wires.

4. Christmas lights were expensive. Very expensive.

By 1900, it could cost as much as $300 (around $10,000 today!) to pay for the lights, a generator, and a wireman’s services to illuminate a Christmas tree with electric lights. A breakthrough came in 1903 when General Electric (created after another company merged with Edison’s factory) offered the first pre-wired, eight-socket strings of lights. When GE attempted to patent their Christmas “festoons,” their patent application was refused because the product was based on knowledge that ordinary electricians possessed. Once the market was open, other companies and inventors began to produce their own tree light sets, and the American Christmas light industry was born.

5. A 15-year-old helped popularize Christmas lights.

Inspired by a tragic fire that was started by candles decorating a Christmas tree, then-teenager Albert Sadacca suggested adapting the novelty lighting his parents sold for Christmas trees. While only a hundred strings sold in the first year, once Sadacca thought to paint the bulbs red, green, and other colors, the business took off. Sadacca started the National Outfit Manufacturers Association, a trade group of several small companies that consolidated into the NOMA Electric Company in 1926. NOMA became the largest Christmas light company in the world until the mid-1960s.

6. Early lights were elaborate.

Many of the early figural light bulbs were blown from the molds that were also used to make glass ornaments, and were then painted by toy makers. The paint would often flake from the constant expansion and contraction of the glass (due to the heat generated as a byproduct of making light), so milk glass was typically used to make the flaking paint less noticeable.

7. Christmas lights weren’t safe for outdoor use until the 1920s.

President Calvin Coolidge was responsible for the first National Christmas tree in 1923. The 48-foot tall balsam fir came from Coolidge’s home state of Vermont and was adorned with 2500 red, white, and green electric bulbs. But for most of the country, outdoor lights wouldn’t be widely available until 1927. To increase sales, General Electric and various distribution companies sponsored neighborhood “decorating with color-light” contests, a tradition that continues today.

8. The Guinness World Record for the “most lights on a residential property” belongs to a family in New York.

Move over, Clark Griswold. The Gay family strung 601,736 lights around their LaGrangeville, New York, home in 2014 to reclaim the Guinness World Record for the most lights on a residential property. Set to more than 200 songs, the installation took the crown with help from Ritz Crackers, which contributed a 200,000-light display.

9. A theme park in Japan holds the record for the “most lights on an artificial Christmas tree.”

Universal Studios Japan, in Osaka, smashed its own Guinness World Record for the most lights on an artificial Christmas tree in November 2022. It’s eye-popping display contained 612,000 lights.

10. An Ohio electrical engineer made a Trans-Siberian Orchestra song a holiday staple with his light display.

Mason, Ohio, resident Carson Williams spent nearly two months programming 25,000 lights to the Trans-Siberian Orchestra’s song “Wizards in Winter,” which he transmitted through a FM channel. The Christmas light display became one of YouTube’s early viral videos in 2005. “It just shocked everybody that it took on a life of its own,” TSO creator Paul O’Neill told The Providence Journal. “When you go to Disney World or MGM, all the lights are all going off to Trans-Siberian Orchestra music.”

11. Blinking Christmas lights rely on a simple thermostat.

Those red-tipped mini lights that enable a string to twinkle work through a simple design. When electricity heats a strip of metal in the bulb, it bends and breaks the circuit. As the metal cools, it bends back and reconnects the circuit to create an intermittent flashing effect. But more modern light displays use an integrated circuit.

12. Some municipalities issue fines for leaving Christmas lights up too long ...

Residents of Aurora, Illinois face a fine of $50 or more if they do not take their lights down by February 25. 

13. … while other organizations ban elaborate tableaux.

Several homeowners associations across the country ban outdoor light displays, with one in Idaho making news in 2015 for threatening to sue a resident for an overly elaborate display.

14. Hanging outdoor lights (and other decorations) can be dangerous.

According to the Consumer Product Safety Commission (CPSC), thousands of people are treated in emergency rooms around the country for injuries connected to holiday lights, Christmas trees, ornaments, and other decorations during the holiday season. The most common injuries are falls, lacerations, and back strains.

15. Fires from Christmas lights still pose a risk.

While electric lights greatly reduced the risk of fire, the CPSC estimates that fire departments respond to several hundred fires each year in which the Christmas tree was found to be the first item ignited. To prevent fires, make sure to water trees frequently, unplug lights when leaving home, and discard holiday light sets with damage such as exposed wires and broken sockets.

A version of this story ran in 2015; it has been updated for 2022.