The ability to influence how much light you would like to have filtered with your blind/shade. Blinds/shades that offer special options, such as De-Light, blackout, cocoon, etc. can blockout almost all light

The ability to control the amount of incoming window light. Blinds with slats or louvers provide the best light control.

The ability to allow different levels of light to penetrate a room, from complete privacy to full daylight.