Lighting is one of the most important aspects of any interior design. It helps to set the atmosphere of the room, create a desired ambience, and can even be used for practical purposes, such as task lighting. The types of lighting available are vast and varied. Incandescent lighting is one of the most popular sources. This type of lighting is efficient, inexpensive to replace, and can be found in many forms. Fluorescent lighting is also popular, as it is very energy efficient. LED lighting is becoming more frequent in interior design, as it is much more energy-efficient than incandescent lighting. The use of natural light is also important to consider when creating an interior design. Where possible, take advantage of natural light, such as sunlight streaming in from windows or strategically placed skylights. If natural light is not available, be sure to use a mix of different light sources, such as floor lamps, wall sconces, table lamps and track lighting, to fill the room. Lighting can be used to create a certain mood in a room. For example, a dimmer switch can gradually adjust the light level to create a relaxed atmosphere. Bright light is better for tasks and activities. To add texture, combine light and shadow. This can be done with directional lamps or light that is emitted from different levels. Lighting is a key part of any interior design plan. Taking the time to consider the best type of lighting and how it should be used in the room can make a significant difference in the final outcome of the design.