The involvement of a lighting design in a project can assure long-term cost-savings in terms of equipment, operations, people, and aesthetics.
Studies show the quality of light affects people in many different ways. For example, office worker satisfaction and productivity can be positively affected by well-designed illumination.
Firstly, it is necessary to gain a full understanding of what the lighting installation is intended to achieve, such as relation to a shape of space, an interaction of daylight, direction of light.
Secondly, consideration is given to how the light is to be delivered, e.g. will it be recessed, surface mounted, direct or indirect, or will up-lighting be used, and its primary characteristics, e.g. will it be prismatic, low brightness or mellow light.
Also, it is necessary to consider using the maximum of daylight and minimizing the need for artificial lighting.
The performance of a luminaire should be considered just as carefully as its cost. In the long term a well-designed, well-constructed luminaire will be cheaper than a poor quality unit.