background diffuser egg crate pattern light diffuser panel texture white bumps bright bulb case CFL diffused light housing illumination lamp light light fitting Light Fixture lighting luminous colorful colourful dark diffused gold golden lampshades lights orange patterns shadow and light shapes textures unusual variety circular corner diffused-light gray grey handrail inside interior intricate limited patterned shadowy silhouette spiral spiral-staircase spiraling spiralling staircase stairs steps structure sturdy turning turns window wrought-iron angled angles architectural-elements ceiling greyscale monochrome reflections shiny upstairs abstract color colored colour coloured curved curves decoration decorative distinctive distorted lampshade lined lines perspectives plastic round surface surfaced surfaces textured through thru translucent variations wallpaper wavy flooring polished sepia