Philadelphia's Christmas Light Show and Disney's Christmas Tree also began in 1956. In Canada, archival photos taken in 1956 around suburban Toronto capture several instances of outdoor evergreens illuminated with Christmas lights. Though General Electric sponsored community lighting competitions during the 1920s, it would take until the mid-1950s for the use of such lights to be adopted by average households. Christmas lights found use in places other than Christmas trees. By 1919, city electrician John Malpiede began decorating the new Civic Center Park in Denver, Colorado, eventually expanding the display to the park's Greek Amphitheater and later to the adjacent new Denver City and County Building - City Hall upon its completion in 1932. Soon, strings of lights adorned mantles and doorways inside homes, and ran along the rafters, roof lines, and porch railings of homes and businesses. In recent times, many city skyscrapers are decorated with long mostly-vertical strings of a common theme, and are activated simultaneously in Grand Illumination ceremonies. In 1963, a boycott of Christmas lights was done in Greenville, North Carolina, to protest the segregation that kept blacks from being employed by downtown businesses in Greenville, during the Christmas sales season. Known as the Black Christmas boycott or "Christmas Sacrifice", it was an effective way to protest the cultural and fiscal segregation in the town with 33% black population. Light decorations in the homes, on the Christmas trees, or outside the house were not shown, and only six houses in the black community broke the boycott that Christmas. In 1973, during an oil shortage triggered by an embargo by the Organization of Arab Petroleum Exporting Countries (later OPEC), President Nixon asked Americans not to put up Christmas lights to conserve energy use. Many Americans complied, and there were fewer displays that year. In the mid-2000s, the video of the home of Carson Williams was widely distributed on the internet as a viral video. It garnered national attention in 2005 from The Today Show on NBC, Inside Edition and the CBS Evening News and was featured in a Miller television commercial. Williams turned his hobby into a commercial venture, and was commissioned to scale up his vision to a scale of 250,000 lights at a Denver shopping center, as well as displays in parks and zoos. Technology The technology used in Christmas lighting displays is highly diverse, ranging from simple light strands, Christmas lights (a.k.a. Fairy lights),