Lighting can be defined as the science and technology of controlling the artificial production of light to provide the right level of illumination, in terms of both intensity and distribution, to suit any particular situation. Light is necessary for any environment, and lighting systems must be able to reproduce the feel of daylight, while also allowing control over the level of lighting to suit different tasks and conditions. Thus, lighting engineers must be proficient in the physical and technical aspects of lighting, such as knowledge of luminaries, optics, electricity, and controls. With modern lighting technology, lighting designers now have the ability to create diverse and attractive lighting effects for any setting. For example, LED lighting technology has consumed less energy than traditional forms of lighting, while providing superior color and directional control. Smart lighting systems provide further design possibilities, allowing users to control lighting with a mobile device, or even using voice control. Lighting does more than just illuminate a space; it can also influence the mood and atmosphere of that space. For example, warm lighting and colors can induce a feeling of relaxation and comfort; whereas cool lighting can create a feeling of energy and excitement. Lighting has come a long way from the days of inefficient bulbs and fixtures, and will continue to evolve as technology advances. With lighting engineers knowledge and understanding of light, it is possible to create comfortable lighting environments that not only serve the practical purpose of providing illumination, but also enhance the aesthetic quality of any space.