Lighting plays an important role in our daily lives. Lighting can affect how we feel and how we think, making it an important building block for maintaining a healthy lifestyle. Light affects our ability to see, making it essential for being able to perform most functions properly. For example, when working in a dark area you may not have the same focus and accuracy as you would when working in an adequately lit environment. The colour of the light also has an effect, with warm yellow tones boosting moods while cooler blue tones increase alertness and vigilance. Light is also closely linked to our circadian rhythm, helping to keep us awake and alert during the day, and sleepy and relaxed at night. The best way to take advantage of this connection is to get natural daylight during the day and limit exposure to bright artificial lights at night. This will help to keep the body's internal clock in check, inside and out. To get the most from lighting, it helps to have the right fixtures and fittings in the home and workplace. Investing in energy efficient lighting is a great way to cut down on energy costs, and LED lights have become increasingly popular due to their long life and high efficiency compared to other technologies. In conclusion, lighting is an important part of our everyday lives and having the right lighting can have a positive effect on us mentally and physically. Making sure that you get natural daylight during the day and reducing exposure to bright artificial light at night will help to regulate your circadian rhythms, while using energy efficient lighting can help reduce your energy costs.