Commandingly sited atop the highest floors of the five-star St. Regis Hotel in San Francisco, this rare two-story penthouse boasts 360-degree views of the city. One of the world's most extraordinary residences, it showcases the ultimate in bespoke architectural design, innovative infrastructure and perfectly integrated architectural lighting features. The seamless design strategy, a driving factor for the architecture, also drove many lighting design decisions. Due to the nature of the project, budget wasn't a concern, but the use of highly efficient sources throughout to achieve elegant yet sustainable results was a client requirement, implemented by the design team.