NOVELTY - Solar collection device comprises solar cell(s) (830) having absorption bandwidth, solar concentrating mirror positioned in proximity to solar cells, and celestial tracking mechanism connected to solar cells or solar concentrating mirror. The solar concentrating mirror comprises multilayer optical film, and UV protective layer applied onto surface of multilayer optical film, where solar concentrating mirror reflects average light across wavelengths corresponding with absorption bandwidth of solar cell onto solar cell.    USE - Solar collection device.    ADVANTAGE - The device provides specific bandwidths of electromagnetic energy to solar cell while eliminating or reducing undesirable bandwidths of electromagnetic energy that may degrade or adversely affect the efficacy of the solar cell, and renders compliant sheet of material that may be readily formed into a multitude of shapes or constructions for end use applications.    DETAILED DESCRIPTION - Solar collection device comprises solar cell(s) having absorption bandwidth, solar concentrating mirror positioned in proximity to solar cells, and celestial tracking mechanism connected to solar cells or solar concentrating mirror. The solar concentrating mirror comprises multilayer optical film having optical stack with alternating layers having birefringent polymer(s) and second polymer; and UV protective layer applied onto surface of multilayer optical film, where solar concentrating mirror reflects at least major portion of average light across wavelengths corresponding with absorption bandwidth of solar cell onto solar cell and does not reflect onto solar cell major portion of light outside absorption bandwidth of the solar cell. An INDEPENDENT CLAIM is included for a method of collecting solar energy comprising positioning a louver.    DESCRIPTION OF DRAWING(S) - The drawing shows a diagram showing the array of solar cells with louvers comprising solar concentrating mirrors.    Array (800)    Louvers (810)    Sunlight (828)    Solar cells (830)