Lighting refers to the use of light to achieve a practical or aesthetic effect. Indoor lighting is usually accomplished using light fixtures, and is a key part of interior design. Lighting can also be an intrinsic component of landscape projects. Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight. Daylighting (using windows, skylights, or light shelves) is sometimes used as the main source of light during daytime in buildings. This can save energy in place of using artificial lighting, which represents a major component of energy consumption in buildings. Indoor lighting is usually accomplished using light fixtures, and is a key part of interior design. Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants. In addition to providing light on the interior of spaces, lighting can also be used outside of buildings, to illuminate sidewalks, parks, and other outdoor areas. Landscape lighting that emphasizes certain plants, trees, or other natural features can be used to create a desired visual effect. Generally speaking, modern lighting is becoming more energy efficient, such as compact fluorescent lamps and LEDs. The United States Department of Energy is charged with promoting energy efficiency in the country, and has put in place regulations that promote more efficient lighting. All in all, Lighting plays an important role in our life. Making good use of lighting to get a better effect.