Colour Rendering Index (CRI) for an LED Bulb
The Colour Rendering Index (CRI), also known by the acronym CRI (from the English Colour Rendering Index), is an essential measure for assessing the quality of light produced by a light source, such as an LED bulb. It indicates the ability of light to accurately reproduce the colours of objects compared to a natural light source, such as daylight.
How does the CRI work?
The CRI is expressed on a scale of 0 to 100. An index of 100 corresponds to perfect colour reproduction, similar to that of natural light. The higher the index, the more vivid and accurate the colours appear. Conversely, a low CRI results in dull, faded or even distorted colours.
Why is CRI important for LEDs?
LED bulbs, although economical and durable, can vary considerably in terms of light quality. A high CRI (above 80, or even 90 for demanding applications) is crucial in environments where colour accuracy is essential:
Offices and workspaces: for optimal visual comfort.
Clothing shops, art galleries: to showcase products and works of art.
Kitchens and bathrooms: where colour perception influences food preparation and make-up application.
How to choose an LED bulb with a good CRI?
Check the packaging: most manufacturers indicate the CRI on the packaging of light bulbs.
For general domestic use, choose CRI ≥ 80.
Opt for CRI ≥ 90 in professional or artistic contexts requiring high colour fidelity.
In summary, CRI is an essential criterion for ensuring that your LED lighting not only provides good brightness, but also natural colours that are pleasing to the eye.