People view an installation named "Lumenus" during a light art festival in Knokke-Heist, Belgium, on Dec. 18, 2021. (Xinhua/Zheng Huansong)
People view an installation named "Sensing Color, Sensing Space" during a light art festival in Knokke-Heist, Belgium, on Dec. 18, 2021. (Xinhua/Zheng Huansong)
A man takes photos in front of an installation named "Star in Motion" during a light art festival in Knokke-Heist, Belgium, on Dec. 18, 2021. (Xinhua/Zheng Huansong)
Children pose for photos by an installation named "Absorbed by Light" during a light art festival in Knokke-Heist, Belgium, on Dec. 18, 2021. (Xinhua/Zheng Huansong)
People view an installation named "Soundwaves" during a light art festival in Knokke-Heist, Belgium, on Dec. 18, 2021. (Xinhua/Zheng Huansong)
People view an installation named "Sensing Color, Sensing Space" during a light art festival in Knokke-Heist, Belgium, on Dec. 18, 2021. (Xinhua/Zheng Huansong)