Lighting plays an important role in people's lives. Every day, people use artificial light sources such as lamps, torches, and overhead lighting. Lighting can be divided into two main categories: natural and artificial lighting. Natural lighting comes from the sun and affects the environment. For example, it can affect how animals behave since they are adapted to long days of light in the summer and short days of light in the winter. Natural lighting is also important for plant growth. Artificial lighting is used to supplement or replace natural light. It is used for tasks such as reading and night-time activities. Artificial lighting can sometimes serve as a form of entertainment. For example, holiday decorations such as Christmas lights are designed to create a festive atmosphere. In addition to providing illumination, some types of lighting can also generate heat. For example, incandescent bulbs generate enough heat to raise the temperature of a room. Lighting has many uses in both the home and the workplace. It can be used to create certain moods or atmospheres and to improve visibility. It can also provide safety, as it can help people avoid obstacles and identify possible dangers. Lighting is a valuable resource and should be used responsibly. It can be used to save energy and money by using energy-saving bulbs and controlling lighting levels. In addition, lighting should be properly maintained to ensure that the bulbs last longer and to reduce the risk of fires.