This stone-shaped bulb is rendered in a reflective, black glass. The organic form adds an extra dose of shimmer, while the inner filament forms a loose knot in the center and emits an enchanting warm light within the irregular design. This stone-shaped bulb is rendered in a reflective, black glass. The organic form adds an extra dose of shimmer, while the inner filament forms a loose knot in the center and emits an enchanting warm light within the irregular design. NUD is a creative lighting concept which makes you the designer - harnessing the impact of light to illuminate and adorn your interiors. The NUD concept draws inspiration from Scandinavian design tradition, where form and function fuse to form pared-down elegance.