What is Light Reflective Value (LRV)?

The definition of Light Reflective Value (LRV) is the percentage of light something reflects, this can be affected by the colour and texture of an item. White would be 100% as it reflects 100% of the light, whereas black would be considered 0% as it reflects none of the light. Light Reflective Value is used to predict how light or dark something will appear, and therefore how easy it will be to see it. One of the most important reasons behind measuring the LRV and ensuring you are adhering to regulations is so that people who are partially sighted can see the contrast in where one step ends and the one below begins. If there is not a 30-point difference, then it makes it a lot more difficult for people who are partially sighted to see the contrast in stair edge.