Design blog Rock That Font has a short interview with designer Frank Olinsky the designer of Luna's Penthouse sleeve, as well as many subsequent Luna and Dean & Britta sleeves.

Dean had discovered Ted Croner's magical photos of New York City and knew they were just right for the package. Three pictures were used: the cover photo of the lit-up skyscraper, a group of light-streaked high-rise buildings, and a blurry speeding taxi. (This same taxi photo appeared on the cover of Bob Dylan’s 2006 album, Modern Times.)

See also Frank Olinsky's website