Grosvenor has been designed to comply with 'dark sky' requirements, eliminating any upward light whilst providing downward illumination exactly where it is required. A combination of a borosilicate glass prismatic refractor and top hemispherical reflector provides accurate light control and optimum performance and allows wide spacings between columns.

For total flexibility, two distribution types are available, asymmetric and symmetrical, together with optional 180° shields to prevent backwards light when necessary.