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.
David Hakimi is a lighting specialist and one of the co-founders of Alcon Lighting. A graduate of the University of California Los Angeles (UCLA), David works on the front lines of the energy-efficient lighting revolution, enabling architects, designers, and lighting engineers to transition from outmoded halogen and fluorescent lighting to what David calls “the ideal replacement for all lighting applications,” —LEDs. David takes particular pride in Alcon’s design, energy, and green building knowledge, tracing his and Alcon’s commitment to quality, innovation, accountability and value back to the lessons learned from his father, a Southern California lighting salesman and consultant for more than two decades. Passionate about reducing climate change and protecting the environment, David has been particularly valuable in ensuring that his clients and customers comply with rapidly-evolving green building codes. You can connect with David on LinkedIn at https://www.linkedin.com/in/david-p-hakimi/.
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.
For the versatile, upscale look, designers often recommend trimless recessed lighting. The term trimless recessed refers to recessed lighting which contains no visible trim ring. The installation of trimless recessed lighting is more involved. Here are tips we believe will help ensure a clean, professional installation.
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.
Essentially, volumetric lighting refers to the illusion created when a lighting technique suggests a certain perspective, orientation or effect that increases, enhances or magnifies the sense of volume in a given space, context or application. In residential and commercial lighting design, volumetric lighting is often synonymous with task lighting. Light fixtures designed with optics that have a fully luminous and distinguishable beam spread and can be directed, with purpose, to light art, a table, produce in a market, etc.
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.