Lighting is an integral part of the interior design of a home or office and it can be used to create a certain atmosphere as well as to improve the visibility of any given area. It is also important to consider energy efficiency, safety, and cost-effectiveness when making lighting choices. Natural light is the most energy-efficient option. It produces no emissions, and it is free; however, positioning and the materials used on the walls and windows must be considered for natural light to be maximized. Utilizing a combination of lighting techniques can help conserve energy and allow for pleasing and comfortable lighting inside the dwelling. The three most popular types of artificial lighting for domestic and professional environments are: incandescent bulbs, halogen lamps and LED lights. Incandescent bulbs are the most cost-effective option but they have a lower color temperature than other types of lights, so they are especially suitable for ambient lighting. Halogen lamps have high color temperatures and their intense lighting make them ideal for task lighting. LED lighting is the most efficient option and it offers a variety of lighting effects, including color changing and dimming capabilities. Safety should also be taken into consideration when selecting the type and location of home lighting. Indoor fixtures and bulbs must be UL- or ETL-certified, and they must be placed, installed, and used in accordance with the manufacturer's instructions. Outdoor lighting must be placed in the path of an outdoor emergency exit and safety lighting should be used to ensure that passageways and corridors are adequately lit at all times. In conclusion, lighting plays an important role in the design and safety of any home or office. Choosing the right type of lighting for the space and its tasks will ensure proper visibility and create an atmosphere that is comfortable for those who live or work in it.