There is a dazzling "low-altitude colorful cloud" at the Sleepless Night Art Festival in Calgary, Alberta, Canada. This cloud is composed of 6,000 light bulbs, 1,000 of which have independent control switches, and the remaining 5,000 are collected discarded light bulbs, a perfect combination of art and environmental protection. When 1,000 light bulbs are lit at the same time, when viewed from a distance, these luminous bodies combine with other "front" luminous bodies to form a golden cloud, which is extremely attractive.
