Lighting, also known as illumination, is the deliberate use of light to achieve a practical or aesthetic effect. It is an essential part of architecture, interior design and electrical engineering. Lighting can be natural or artificial. Natural lighting is the daylight from the Sun, while artificial lighting comes from fixtures such as light bulbs, LEDs, or fluorescent fixtures. The most common type of artificial lighting is incandescent lighting, which is a fairly inefficient source of light produced by heating a metal filament with electricity, causing it to glow. More efficient and modern lighting technologies include LED (light-emitting diodes) and fluorescent lighting, both of which require less electricity than incandescent lighting. Outdoor lighting is important for security, safety, and aesthetic purposes. Walkways and stairs should always have sufficient, bright lighting, while areas such as gardens and driveways can be better illuminated with softer, lower light levels. Decorative lighting can enhance the beauty and ambience of outdoor settings, such as courtyards and outdoor dining areas. Indoor lighting should be bright enough to provide good visibility, but not too bright to cause glares. The color of light is also important; warm light is more inviting, while cooler light is better for activities requiring concentration. Task lighting is essential for workplaces and kitchens, while accent lighting can emphasize artwork or architectural elements. Lighting is an essential part of everyday life, and can have a major impact on how we feel, think, and function. Good lighting can create a safe, comfortable, and inviting environment.