Lighting is an essential part of our life in various ways. Lighting not only provides good visibility, but also affects our emotional state. It can bring out the best in our room and create a restful setting, or set it on fire with exciting colors and bold illumination. Natural lighting from windows is the best source of lighting. Sunlight is the most energy efficient form of light since it is free and emits no heat. It floods a room with crisp and clear light in the daytime and makes rooms feel open and spacious. Indoor artificial lighting is ideal when natural lighting is insufficient. Bulbs, overhead lighting, and LED lights are the common artificial lights. Bulbs are the traditional type of artificial light which is usually used in offices and homes. However, they waste energy when too much light is produced. Overhead lighting is good for commercial places and large areas. Finally, LED lights provide more brightness and are more energy efficient than other lighting. To sum up, lighting is important in our life due to its various functions. Natural lighting is always preferable to artificial lighting, as it is free and emits no heat. Artificial lighting is necessary when natural sources are insufficient, and LED lights are the most energy-efficient option.