An additional step in reviewing lighting plans should include evaluation of the surfaces and surroundings that could potentially cause reflectance interference. Reflections and glare can cause reduced visibility and become a source of distraction and annoyance. The light will reflect off walls, ceilings, floors and work surfaces. Therefore, the colour, material, and type of finish of these surfaces should be carefully considered. The reflectance from these surfaces contributes to the overall luminance level of the area. The main objective is good visibility conditions for the kitchen.
Ceilings occupy a substantial amount of the field of view and can have a large impact on overall reflectance. For large areas where there is indirect light penetrating the space, it is advisable to render the ceiling white or near white in a non-glossy finish. Regardless of the size of the rooms, the ceiling should have a reflectance level as close to 70 percent as possible. Walls play a similar yet, less substantial role in reflectance.
For surfaces below eye level such as bench tops and floors, non-glossy finishes are recommended. The colours and finishes should be selected with contrasts between surfaces. For example, there should be a significantly visible difference between the bench and wall.