All museum spaces of the Musac Museum in León got a transformation of lighting from Halogen to LED. The museum already had a light infrastructure with ERCO tracks, which has been an advantage in terms of compatibility with the incorporation of the new ERCO lighting systems.
The biggest challenges of the project were the architectural features of the building. Designed by the prestigious Mansilla + Tuñón Arquitectos studio in 2005 and awarded the European Union's Mies van der Rohe Prize for Contemporary Architecture, the museum has ceiling heights from 16 feet (5 meters) up to 24 feet (7.5 meters). This represents a compromise between the necessary power in terms of luminous efficacy and the maximum reduction of energy consumption. In this sense, the project manages to reduce the connected load by 75%, going from 100W for each halogen luminaire to 25W of the new Eclipse OnTrack spotlights with latest-generation LED technology.