Once you know about different types of lighting and are aware of its many possibilities, you can start creating a variety of special effects.
           
The dimmer switch can alter the mood of a room in seconds and is simple to  install.  (If you are unsure about any safety aspects, check with an electrician).

 Make rooms seem larger by flooding the walls with light from bright wallwashers that are either recessed into the ceiling (if you have plaster or wood ceilings, and have enough space ...