The style of the room refers to the type of furnishings and style of decor you select for decorating your living room space. It is important to choose a style that you like and to also make sure that you stay with the one style throughout the living room area.
Lighting is also something to bear in mind when designing your room. The lighting can be from fluorescent bulbs or you can have enough windows to allow more light.
This is not to say that all items need to be made in the same period have the same texture or be of the same color but instead that you should stick with a few themes and make sure that one or two are reflected in each and every piece of furniture that you have in your living room.