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.
The main writer for Alcon Lighting’s blog.
As an industry, electrical lighting is relatively new—less than 150 years old —and it originated thanks to an entrepreneur. This individual conceived of electrical lighting as a process of busy, active thought, contemplation, deliberation, experimentation and invention. His name is Thomas Edison.
Talieh Ghane researches the interaction between light and health at the California Lighting Technology Center. We talked about the biological vs. visual system of light, how to synchronize your circadian clock for better health, how light is like a drug, and why you shouldn’t be on your phone right before bed (guilty).
Success in the business of fitness pivots on retaining users by optimizing the user’s experience. This could entail expanding the digital class or reconfiguring an in-person experience for optimal health and inspiration. Lighting is crucial for achieving both.
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.
The term Architectural Lighting encompasses three main factors. The first is the building’s aesthetic, which is crucial for any commercial, especially retail, environment. The second consideration is ergonomic or functional — any aspect which improves one’s ability to live, work, function, relax or play — to make the space easier to use. The third aspect involves the efficiency of energy, ensuring that light is properly, which is to say economically or optimally, used and distributed.