Lighting is the use of artificial light sources to create an atmosphere. Lighting is a crucial part of any environment, be it residential or commercial, indoors or outdoors. Proper lighting can enhance the look and feel of a space, while poor lighting can have the opposite effect. Not only can good lighting provide a safe and comfortable atmosphere but it can also help to provide a feeling of security. Lighting can be used to create a range of different advantages. The most common advantage of using lighting is to create moods. Different light types, colors, and lighting patterns can be used to either stimulate or relax a person and/or the environment. Task lighting, often in the form of desk lamps and floor lamps, is another popular use for lighting, as it helps to provide greater visibility for a specific task being conducted. In addition to its aesthetic value, lighting can be used to provide additional illumination where natural lighting may be inadequate. This can be especially helpful in dark or confined places, such as corridors or elevators. Finally, lighting can also be used to mark exits and entrances, in order to provide a quick visible guide in the event of an emergency. No matter the purpose, lighting has become an integral part of everyday life. Its ability to transform an atmosphere and create a positive effect can never be underestimated.