What is correlated color temperature (CCT)?
Correlated color temperature (CCT) is a measurement that indicates the hue and tone of white light produced by a particular bulb or lighting fixture. CCT is measured in Kelvin (K), which is similar to degrees in Celsius. Different temperatures on the Kelvin scale correspond to different colors of light. For example, lower temperatures (2000K-3500K) result in a more orange/yellow light known as ultra warm or warm white. As the temperature increases in Kelvins, the color of the light shifts towards a “paper white” known as natural or neutral white (between 3500K and 5100K), and eventually to a bluish-white referred to as cool white (5100K-20000K).
What is the best CCT for each application?
The optimal CCT for a specific application depends on personal preference and the type of environment. In a relaxed setting like a home living room or nursery, a lower CCT in the warm white range is commonly preferred. Warm white light enhances warm colors in a room, minimizes the visibility of imperfections, and appears less bright when compared to higher CCTs. On the other hand, in environments where visibility is crucial, such as offices or warehouses, a higher CCT in the natural or cool white range is recommended. Higher CCTs make the light appear brighter and more crisp, which is beneficial for tasks that require focus and clarity.
Why can lights with the same CCT look different?
Even though two bulbs or lamps may have the same CCT, they can exhibit different chromaticities. Chromaticity refers to the hue and saturation of a color without considering its brightness. The variation in chromaticity can be due to differences in the manufacturing process, the quality of the components used, or other factors. To ensure consistency in lighting, it is advisable to acquire bulbs or fixtures from the same manufacturer. However, if obtaining products from the same manufacturer is not possible, it is recommended to select bulbs based on their CCT and test them to see if their visual appearance matches your requirements.
Warm white LED lighting is ideal for creating a cozy and comfortable atmosphere in bedrooms, as well as in gold and luxury shops. The warm hue of this lighting enhances the warm tones in the space, creating a pleasant ambiance.
Natural white LED lighting, on the other hand, is well-suited for school and office environments. It provides a neutral and balanced illumination that promotes focus and productivity.
For long durations of indoor stay, Dynamic Human Centric Light (DHCL) is preferred. DHCL systems are designed to mimic natural daylight, adjusting the color temperature and intensity of light throughout the day. This dynamic lighting solution helps regulate the body’s circadian rhythm, enhancing well-being and promoting a more natural and balanced indoor experience.
