Do you find it difficult to distinguish your black and blue socks from each other? This may be because the nearest light source has a low CRI. Several factors must be considered when choosing the optimal lighting system for a specific space. Color rendering is one of these factors.
It should be noted that all light sources exhibit a specific light spectrum.
Color rendering refers to how well light sources reproduce colors and is measured on a scale from 0 to 100. This index indicates how accurate the light source’s color is in relation to sunlight. The higher the CRI, the closer the light source is to natural light. Daylight has a CRI of 100.
The colors we perceive are based on this spectrum.
CRI between 0 and 70
Light sources with a color rendering index below 70 alter our perception of color. Light sources in this index category include:
– Fluorescent tubes
– Low-pressure sodium vapor fixtures
– High-pressure lamps (with the exception of white fixtures)
– Mercury-based clear fixtures
CRI between 70 and 90
These light sources display colors satisfactorily. Some of these include:
– Standard LED lamps
– Various fluorescent tubes
– A number of metal halide fixtures
– High-pressure sodium vapor lamps
CRI between 90 and 100
– High-efficiency LED lamps
– A number of metal halide fixtures
– Incandescent lamps
How do you choose the right CRI for your lighting system?
It depends on the conditions and the environment in which the lighting will be used.
– For outdoor use, lighting systems with a CRI below 70 can be selected, provided it is not necessary to distinguish colors accurately.
– For indoor use, it is always better to choose a lighting system with a CRI higher than 70.
A CRI higher than 80 is recommended for environments where precision work is performed, such as in manufacturing industries and shops.
– When a space requires lighting of exceptional quality, such as in art galleries or pharmaceutical manufacturing, it is advantageous to use fixtures that reproduce the color spectrum as faithfully as possible. In these cases, a CRI higher than 90 is required.
In summary, the color rendering index is a value representing how colors are reproduced in relation to daylight.
