Lighting University

Application Bundles - Training Tool

Measuring Light

Color Rendering (Ra)

CRI: 50-70
Fair

CRI: 70-80
Good

CRI: 80-90
Excellent

  • Color rendering, expressed as a rating from 0 to 100 on the Color Rendering Index (CRI), describes how a light source makes the color of an object appear to human eyes and how well subtle variations in color shades are revealed.
  • Ra can be found in the specifications of the luminaire. The higher the number the less color distortion.

All Philips LED luminaires have a CRI of > 80.

Good color rendering Ra > 80

Poor color rendering Ra < 80

We don’t measure Ra on site but we can observe and experience it:

Look at the skin of your hands.How do they look? Natural, or brownish? Yellowish? How do you perceive the colors around you?

Next Previous

© Koninklijke Philips N.V., 2015. All rights reserved. Any unauthorized reprint or use of this material is prohibited. No part hereof may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system without express written permission from the owner.