Unless youre positively obsessed with sunlight and totally unconcerned with personal privacy, you will want to have something to cover your windows. Direct sunlight through an uncovered window can raise the temperature in your home or office significantly. It may also interfere with your sleep if you want to sleep past sunrise. Consumers have a wide variety of options for covering their windows, but the most stylish and popular one is probably venetian blinds. Venetian blinds were a fixture in many older movies because the shadows they created added a certain degree of ambiance to scenery on film, especially black and white pictures. Film noir buffs are already familiar with these blinds, but everyone else might need a more detailed description. Venetian blinds are composed of horizontal slats that are situated on top of one another, almost like a ladder. The slats are usually made of their metal or plastic, although wooden ones are available as well. Most of the time, wooden venetian blinds are made of bamboo because it is very light wood thats also appealing to the eye. No matter what the slats are made out of, they are held together with some kind string or cording. This allows them to be manipulated at various angles to control the amount of sunlight they let in. The cords dont just manipulate the angle, though. They are also what pull them collectively up or down as a unit to cover the window completely or leave it entirely exposed.