Technical Info: Colour Rendition
The higher the CRI rating is, the better its colour rendering ability. In layman’s terms this means……. will the object you are looking at be the same colour when you look at it in natural light. This is why the produce you buy in store sometimes looks much less desirable or fresh when you get it home. Colour Rendition is a way of measuring how accurately a given light source will represent colour.
The number is shown next to the initials CRI (Colour Rendering Index). Lights sources such as LED, halogen, fluorescent and HID will have different abilities to reflect colour as will different manufacturers. Early LED lights had very low CRI but this has improved greatly in recent times. However, there are still companies supplying LEDs, particularly industrial lights, with a distinct green tinge. LED is becoming dominant in retail and commercial lighting fields
The chart below should only be seen as an approximate guide in selecting CRI.
The sections below may allow you to understand some basic lighting concepts and cover the basics in allowing you to select products. IES files are available on request.
|Colour Rendering Index|
|Ra||Application or Use|
|90 and Over||Galleries, art exhibitions, safety applications or anywhere safety is important|
|70-90||Commercial, residential, retail, hospitality|
|60-80||Waiting rooms, commercial, light industrial, offices and educational|
|40-70||Warehouse, light and heavy industrial, workshops where colour is not a