Multiple light-source illuminating system

An illuminating device intended for positioning relative to one or more predetermined surface areas having an overall light distribution pattern calculated to efficiently illuminate the predetermined surface areas with a design illuminance and color, comprising:

• a) a multiplicity of light sources having respective spectral distributions and respective light intensity distribution patterns which are directional about an axis and subtend lesser angles than those of the overall light distribution pattern, and
• b) a light source mounting structure configured to mount the light sources.
• c) a positioning apparatus to uniquely affix the structure relative to the predetermined surface areas to be illuminated,
• d) where said light sources are uniquely disposed on the structure relative to the positioning apparatus and angularly mounted on the structure with the light distribution axis having a vertical angle α from the nadir and a radial angle β relative to the positioning apparatus and
• e) where said unique disposition and angular mounting is determined by the greater or lesser luminous intensity required from portions of the relatively positioned lighting fixture structure so as to substantially illuminate the predetermined surface areas with the design illuminance,
• whereby the respective directional light distribution patterns and the respective sectral distributions combine to form the overall light distribution pattern calculated to efficiently provide the predetermined surface areas with the design illuminance.