Lighting is an essential element in our daily lives. It serves many purposes such as providing light in dark places, helping us see better, providing psychological comfort, and even contributing to our work performance. In homes, offices and other public places, lighting is used to reduce eye fatigue and improve aesthetics. Lighting can be divided into two main categories, natural lighting and artificial lighting. Daylight is a source of natural light and is often used to reduce energy costs in commercial buildings, retail stores, and residential homes. In areas where there is no natural light, artificial lighting is used. There are different types of artificial lighting, such as incandescent, fluorescent, and LED lighting. Incandescent bulbs are generally the cheapest to buy but are the least energy-efficient. Fluorescent lights are more energy-efficient than incandescent, and LED lights are the most energy-efficient of all, consuming up to 75% less power than traditional bulbs. No matter what type of lighting is used, there are certain measures that can be taken to improve energy efficiency and reduce costs, such as using light dimmers, motion sensors, or timers. Additionally, the use of LED bulbs and other energy-efficient lighting options can significantly reduce electricity bills. In conclusion, lighting is an essential part of our lives; it serves many purposes and can provide psychological comfort in many different environments. Additionally, by using proper lighting techniques and energy-efficient lighting, we can reduce energy costs and improve our overall work performance.