important lighting detail do not add led strips to every shelf the led lighting should only be hidden behind the frame of each recessed millwork niche the light should wash inward softly into the niche creating a warm glow around the inside frame the led strip itself must not be visible there should be no horizontal led lighting on each individual shelf add tasteful books and elegant decorative accessories to the built in shelving throughout the millwork the styling should feel refined classic and appropriate for a high end executive office include a balanced mix of books a few decorative objects and subtle accessories while keeping the shelves curated and not cluttered respect the existing shelf sizes proportions and spacing