Lighting is one of the most important elements in interior design. It can be used to create moods, accents, set tones and can even help create the illusion of more space. In the home, carefully planned lighting can create a relaxing atmosphere, while office lighting helps create a productive workspace. Lighting can be used in two ways: practical and decorative. Practical lighting is used to illuminate areas of the room, such as work stations, reading areas and kitchen preparation areas. Decorative lighting, such as pendant lights, table lamps and wall sconces, can be used to enhance the decor of the room. These can come in various styles and materials. Lighting also has an impact on our energy consumption. There are a variety of energy-efficient lights available, such as LED lights and compact fluorescent lamps (CFLs), that can help reduce electricity bills. Also, homeowners should consider installing dimmers or motion sensors in order to further reduce energy usage. In conclusion, lighting is a key element of interior design that can be used to make a room comfortable and inviting. Careful consideration should be given to lighting design as it can have a huge impact on the mood, atmosphere and energy consumption of the room.