Lighting is a vital element to the overall look and feel of a building. An interior or outdoor lighting design plan requires special consideration, and thats where lighting design professionals come in. They are knowledgeable about the different types and sources of lighting, how to layout lighting fixtures in order to achieve certain effects, and what types of dimmers and switches are available for the desired purposes. One of the most important aspects of successful lighting design is the balance between energy efficiency and desired effect. Lighting professionals must not only be knowledgeable about the different types of light, such as incandescent and fluorescent, but also be able to analyze the size and shape of a space to determine the best overall lighting scheme for that space. Lighting plans should be tailored to each environment and persons specific needs. Mood and task are two other important considerations in a lighting design. Mood lighting is used to create a certain atmosphere or environment, while task lighting illuminates spaces or objects for precise activities. Some people choose to combine task and mood lighting when the two are needed in the same area, while others may choose to separate the two. The right lighting design plan can completely transform a space. By considering the overall goal, and keeping energy efficiency, mood and task needs in mind, lighting designers help to brighten up any area.