Lighting is often overlooked in design despite it being an integral part of our daily lives. Lighting plays an important role to set the mood, and provide a sense of security in both residential and commercial settings. Indoor lighting is vital for illuminating both our living and work spaces, while outdoor lighting will help to make an entryway look inviting, provide a much needed sense of security and also ensure safety. Lights also play a critical role in the layout of a home or business. By making the right decisions about lighting, you can bring out the best features of a space. Efficient lighting is an important consideration in any residential or commercial space. It is essential that lights are adjustable so that they can be altered depending on the time of day or the specific task at hand. Lights should be chosen according to their energy efficiency and the return on investment (ROI). While LED lights may be more expensive to purchase, they offer a much higher level of efficiency and are estimated to save up to 90% more energy than traditional sources. Furthermore, LED lights last significantly longer than incandescent or CFL bulbs, which means that there is a reduced frequency of maintenance costs and replacement. Finally, natural lighting should play a pivotal role in the design of any residential or commercial space. Incorporating sunlight into our daily life reduces energy costs, improves physical and mental wellbeing, and brings the outdoors in. In conclusion, lighting plays a vital role in the design of any space. It can influence the mood in a room, and create a sense of safety and security. Efficient lighting can help to save energy costs, while natural lighting brings the benefits of the outdoors in.