Tips for Illumination on Flat Surfaces

The benefits of natural light – using diffused daylight reflected off light-coloured walls – can save energy while increasing the comfort levels and amenity of the internal environment. This will also reduce the effects of glancing light on the walls and ceilings. Paint is one of our most effective lighting tools. Light-coloured matt paint or fine textured finishes will diffuse and reflect both natural and artificial light. Diffused light reflected from a number of directions will help mask minor surface imperfections while creating a more comfortable environment for the inhabitants. Direct light from a single source, darker colours and gloss finishes will exacerbate any surface imperfections. The following Figures illustrates the details to be noted when installing lights on some flat surfaces.

Figure 1: A surface mounted light fitting will cast a sidelight across the ceiling, highlighting even the smallest imperfections.

Figure 2: Improved lighting design with the light fittings either recessed into the ceiling or suspended below with reflectors direct the light into the room rather than across the ceiling

Figure 3: Align plasterboard joints parallel with wall lighting rather than across the light.

Figure 4: Align plasterboard joints parallel with light coming from a window rather than across the light.