Color temperature is officially defined as the description of different colors produced by adding different temperatures to an absolute black body, expressed in units of Kelvin (K), with a single value of 1K. In daily life, we usually use only three different color temperatures: 3000K (warm light), 6500K (white light), and 4000K (neutral color) formed by mixing two light sources in adjustable lighting fixtures. However, the color temperature of lighting fixtures is not limited to these few. By learning more about the meanings and values of various color temperatures, we can purchase lighting fixtures that meet our needs instead of blindly following trends. With the increasing ability to purchase and specialized application scenarios, more and more types of color temperatures are being used, allowing us to build a more reasonable lighting environment. Warm light refers to light with a color temperature below 3300K, similar to incandescent light. At a color temperature of around 2000K, the light is similar to candlelight, containing more red components, which can give people a warm, healthy, comfortable, and sleepy feeling. Neutral light has a color temperature between 3300K-5000K. Due to its soft light, it can make people feel happy, comfortable, and peaceful. Cold light has a color temperature of 5000K or above, close to natural light, giving people a bright feeling, improving concentration and preventing fatigue.