Color temperature is measured in Kelvins (K) and it represents the hue emitted by a light source, ranging from warm to cold. Warm lights (around 2,700K - 3,000K) emit a soft, yellowish hue similar to incandescent bulbs, creating a cozy and relaxed environment. In contrast, cool lights (above 4,500K) resemble natural daylight and promote alertness and concentration. For precision tasks such as technical drawing or intensive studying, a cooler light temperature around 5000 Kelvin is recommended, as research indicates it enhances mental alertness and improves mood. On the other hand, for relaxation and reading in the evening, a warmer light temperature, closer to 3000 Kelvin, is advisable as it promotes relaxation and reduces eye strain.