LIGHT REFLECTANCE VALUES (LRV)
The Equality Act (formerly DDA) guidelines on light reflectance have been specifically created to assist designers and specifiers in the design of public buildings to ensure that the building and layout does not discriminate against people with physical or visual impairments. Part of the Equality Act covers Light Reflectance (the amount of light reflected from a surface). This is measured on a scale of 0 to 100 where 0 is perfect black and 100 is perfect white. Typically the darkest black tones achieve 5 to 7 and the whitest white tones achieve 85 to 90.
WHY IS LRV IMPORTANT?
People with visual impairments may have difficulty navigating within a space or locating important elements within that space (doors, stairs, switches, safety handles etc). LRV values enable specifiers to select products that offer a good contrast to the important elements within that room resulting in a space that does not discriminate against the visually impaired.
WHAT IS THE MINIMUM REQUIREMENT?
For smaller contrast areas (doors:walls, handrails:walls, switches:walls, sanitaryware:walls /floors etc) the accepted LRV difference should be a minimum of 30 points, for larger contrast areas (walls:floors, walls:ceilings etc) a minimum of 20 is sometimes accepted.