There are many types of external area which need to be effectively lit, from urban centres, public amenity areas and shopping zones to subsidiary roads and car parks. These areas can vary widely in size and shape, demanding different patterns of light distribution whether the criteria is luminance or illuminance.

Illustrations of some of the Diamond Optic® settings are shown in the Flash movie below. You can select an example lighting application (eg. wide road) and try each of the sample Diamond Optic® settings (A,B and C) to see how the shape of the light distribution changes.