What's the use of lampshades
For instance the lampshade that stands lamp still has wall lamp, have the diffuse that lets the light evenly, such as lamp shade of fluorescent lamp, desk lamp also
Or the light is better spread across the room, depending on what the lampshade is, some of the lampshades are light,
The lampshade can protect the light bulb, the second is to stop the dust, and the third is to let the light concentrate somewhere,