Photo taken on Nov. 27, 2019 shows a light artwork for the Amsterdam Light Festival in Amsterdam, the Netherlands. The eighth Amsterdam Light Festival opened in the Dutch capital on Thursday. Some 20 light artworks, created by Dutch and international artists, illuminated the city center. The festival will last until Jan. 19, 2020. (Photo by Sylvia Lederer/Xinua)

Photo taken on Nov. 27, 2019 shows a light artwork for the Amsterdam Light Festival in Amsterdam, the Netherlands. The eighth Amsterdam Light Festival opened in the Dutch capital on Thursday. Some 20 light artworks, created by Dutch and international artists, illuminated the city center. The festival will last until Jan. 19, 2020. (Photo by Sylvia Lederer/Xinua)

Photo taken on Nov. 28, 2019 shows a light artwork at the Amsterdam Light Festival in Amsterdam, the Netherlands. The eighth Amsterdam Light Festival opened in the Dutch capital on Thursday. Some 20 light artworks, created by Dutch and international artists, illuminated the city center. The festival will last until Jan. 19, 2020. (Xinhua/Lin Liping)

Photo taken on Nov. 28, 2019 shows a light artwork at the Amsterdam Light Festival in Amsterdam, the Netherlands. The eighth Amsterdam Light Festival opened in the Dutch capital on Thursday. Some 20 light artworks, created by Dutch and international artists, illuminated the city center. The festival will last until Jan. 19, 2020. (Xinhua/Lin Liping)

Photo taken on Nov. 28, 2019 shows a light artwork at the Amsterdam Light Festival in Amsterdam, the Netherlands. The eighth Amsterdam Light Festival opened in the Dutch capital on Thursday. Some 20 light artworks, created by Dutch and international artists, illuminated the city center. The festival will last until Jan. 19, 2020. (Xinhua/Lin Liping)

Photo taken on Nov. 27, 2019 shows a light artwork for the Amsterdam Light Festival in Amsterdam, the Netherlands. The eighth Amsterdam Light Festival opened in the Dutch capital on Thursday. Some 20 light artworks, created by Dutch and international artists, illuminated the city center. The festival will last until Jan. 19, 2020. (Photo by Sylvia Lederer/Xinua)