Let’s talk about colour rendering index
In addition to colour temperature, light sources have another very important indicator of lighting quality – the colour rendering index (CRI).
Colour rendering index – indicates how well a light source can reproduce the true colour of an object for our vision (human eye) and how ‘natural’ an artificial light source reveals the difference between colour shades.
The CRI ranges from 1 to 100 and has no units.
Most often, in the industry
luminescent bulbs with a colour rendering index of Ra70 and a colour temperature of 6500K were used most often.
This is due to the low cost of phosphors with such characteristics (the substance that converts the ultraviolet radiation of the lamp into visible light) and the low level of attention paid to occupational safety in previous years.
At first glance, this may not seem to be an important feature, but poor colour rendering leads to faster fatigue of staff, changes in the perception of products in stores, resulting in a decrease in sales, a decrease in the concentration of students in schools, an increase in rejects in production, changes in the perception of prints, paintings, textures, shades and much more.
It is therefore highly undesirable to neglect this aspect, both in business and at home.
You may have experienced this,
When a piece of jewellery or clothing changes its appearance after you have bought it, when you try it on for the first time at home, or when cosmetics change colour in the sun compared to room light.
Such phenomena can be observed when using low quality light sources.
Good colour rendering,
even affects the way we perceive other people, as it affects the tone of skin, cosmetics and clothing.
Nowadays, in the vast majority of rooms, colour rendering should be at least Ra80.
The colour rendering index is a very important factor and VIOLUX specialists ensure that our products meet the highest standards of lighting and building regulations.
