This photo taken on May 26, 2026 shows the lighting installation "Tower of Light" during the Lighting Guerrilla festival in Ljubljana, Slovenia. (Photo by Zeljko Stevanic/Xinhua)

A visitor views a lighting installation during the Lighting Guerrilla festival in Ljubljana, Slovenia, May 26, 2026. (Photo by Zeljko Stevanic/Xinhua)

A visitor views a lighting installation during the Lighting Guerrilla festival in Ljubljana, Slovenia, May 26, 2026. (Photo by Zeljko Stevanic/Xinhua)