A Color Rendering Index (CRI) is a quantitative metric of the ability of an artificial light source (i.e. LED, Fluorescent, Halogen, Incandescent, etc.) to accurately reveal the colors of the subject being lighted in comparison to a natural light source, the sun.
Sunlight, the standard for CRI, is considered to most accurately reveal the colors of a subject.
A CRI of 90 means that the artificial light source is replicating roughly 90% of the visible color spectrum that the sun would produce on the same color.
It is important to note that CRI is independent of color temperature (CCT).
Applications that may require high 90+ CRI include art gallery lighting, lighting for museums, and retail lighting.
CRI is not a measure of brightness, but how sharp colors would appear under the given light source.
In any given space, the CRI of the light source could have a profound effect on how the paint looks, how the furniture look, and how the people look and feel.
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Choosing the right lighting for any space can be a complex decision. Considerations need to be made with respect to the purpose, form and function of the lighting application. Design and aesthetics also play a role in the equation. With so many options for lighting on the market, it takes specialized knowledge and understanding to determine the best fit for your space.
If the work of lighting design was just left to services engineers to meet regulation-determined illuminance criteria per application, then interior and exterior architectural spaces would become soulless environments. Using qualitative measurements, architects and lighting designers can make sure the architectural intention and aesthetic character of a space is not compromised.
Unlike wireless lighting systems like Wi-Fi, Bluetooth Mesh is designed for large collections of devices, numbering into the thousands. Switches, HVAC, sensors, light fixtures, and shades can communicate with each other by forwarding a message, or command, across all the devices in that Bluetooth chain until reaching the destination to perform said operation, (i.e. turn ON the 3rd floor office lights). The communication, instead of passing through your WiFi router, comes from the originating device and travels from light fixture to sensor, to AC unit, to any other chain of Bluetooth Mesh enabled devices, like a Bluetooth highway or a body’s central nervous system, until the command reaches the lights on the 3rd floor.
Besides providing additional lighting with minimal glare in commercial applications such as offices, classrooms and libraries, indirect lighting can also highlight architectural ceiling details such as beams, pipes and other distinctive ceiling traits.
Color-tunable lighting is an exciting and relatively new lighting technology that affords the user an ability to control light color to adapt, soften, and elevate human experiences and environments to particular functions throughout the day, on demand.