Lighting is an important part of life, not only providing essential illumination, but also playing a crucial role in interior design. It creates atmosphere and can be used to emphasise certain areas of a space and hide others. For commercial interiors, like offices or retail outlets, lighting plays an important role in creating a certain ambiance – for instance, a bright and airy atmosphere in a café and a more subdued atmosphere in an office to help facilitate work. When selecting lighting, it is essential to take the different types into consideration. Natural light such as sunlight and moonlight is an inexpensive and accessible option, while artificial light sources, such as incandescent bulbs and LED bulbs, are designed to provide a specific amount of illumination for a given space. Different types of bulbs have different levels of illumination and different colour temperatures. Lighting plays a role in setting the mood of a room, from soothing, natural landscapes to the bright and vibrant atmosphere of a retail store. For maximum effect, the amount and positioning of the lighting should be carefully considered, as this will create a unique atmosphere for the room. It is important to choose energy efficient lighting products when possible, as this will help to conserve electricity and reduce the environmental impact of lighting. LED bulbs, for example, require less energy to produce the same amount of light as traditional incandescent lights, and in some cases can last up to 50,000 hours. In conclusion, lighting is one of the most important elements in any interior design project. It should be carefully selected and implemented to create the perfect atmosphere for the space in question.