Lighting can make a huge contribution to the overall look and feel of a room. A key factor is how the ceiling reflects and diffuses the light. To create a pleasant interior the ceiling should be the lightest surface in the room - a white ceiling will reflect more light than a darker one. The lighting itself should not cause glare or surface reflection. This can be avoided by the installation of indirect lighting.

When a ceiling gives good light reflectance and light diffusion, the need for installed lighting is reduced. This results in improved energy efficiency and a better working environment.