Lighting, or illumination, is the deliberate use of light to achieve a practical or aesthetic effect. Lighting includes the use of both artificial light sources like lamps and natural illumination of interiors from daylight. Proper lighting can enhance task performance, improve the appearance of an area, or have positive psychological effects on occupants. Lighting can also be an intrinsic component of landscape projects. Lamps can be used to increase the aesthetic appeal of a landscaped area or to enhance the safety of users. For example, the installation of path lights along a sidewalk or pathway creates a perception of security, making it easier for people to move about safely at night. Lighting can also be used as part of an energy conservation strategy. More efficient lamps and lighting control systems can reduce the energy required to achieve the same level of light output. Also, with the proper application of task lighting, a significant reduction in the general lighting level may be achieved while concurrently providing the necessary lighting for a task or process. Lighting designers are professionals who specialize in the design and application of lighting systems. Their knowledge and skills enable the use of light as an effective medium in most situations. Lighting designers can create lighting scenarios that maximize energy savings and achieve the desired effect, from simple illumination of an area to dramatic scenic effects. They can create mood and atmosphere in all kinds of settings. In summary, lighting is an important tool for lighting designers and architects, and it is essential in our everyday lives. Lighting designers use lighting to control mood and atmosphere and to increase the safety and aesthetics of an area. Lighting can also be used as an energy conservation strategy. Proper use of lighting can create dramatic scenic effects and enhance task performance in all kinds of settings.