One definition of light control could be not letting any light in the room. This can allow you to sleep longer or to keep your TV watching room as dark as a theater.  Light control can also be defined as  diffusing the light that comes through the window treatment so it is not sharp or harsh. Hunter Douglas Silhouette® shadings and Duette® Architella® shades are good choices when you want the light filtered.  Most all of the shades have an optional room darkening lining or Mylar insert to keep out all light.  

    Don't confuse privacy with room darkening. And don't think you can get shades that you can see out and through but no one can ever see in. 

    Room darkening shades are private.  But so are light filtering shades.  Light filtering shades - sometimes called semi-opaque - let you have light in the room when the shades are down controlling the temperature, privacy and fading. 

    Screen shades allow you to control the sun and heat inside but still let you see outside - during the day.  Remember you see towards the light source.  So if it is light outside, you can still see outside.  But if it is dark outside and you have the lights on in the house, someone can see you in your house - towards the light.  These are not bedroom shades!

    Window treatments can camouflage windows that are different heights in the same room.  And they can help balance windows that are unevenly placed in a room. Note the difference in the look of the room once the window treatment is added.  You can make panels wider, mount rods higher, or add a valance to hide those architectural flaws.