a person carefully adjusts a fabric lampshade over a bright table lamp bulb. The harsh glare from the bare bulb transforms into gentle, diffused light spreading softly around the room. Before the shade was positioned, the light was too bright and created sharp shadows everywhere. Now the lampshade redirects and softens the illumination perfectly. A family member sitting nearby looks up from reading, now comfortable with the pleasant lighting. Another person arranges books on a shelf, benefiting from the evenly distributed glow. a cover for a lamp that diffuses and directs its light