The Spanish town of Puerto de la Cruz Spanish, a tourist hotspot in the Canary Islands, needed to upgrade its lighting to LEDs to reduce its energy costs, improve its citizens’ quality of life, and reduce light pollution — all while maintaining the area’s continued international recognition for the quality of its night-time sky for astronomical observations. Signify and the Canarian Institute of Astrophysics made this possible by using the ClearStar system to reduce the levels of light emitted in the blue spectrum.