Externet Posted March 4, 2013 Posted March 4, 2013 The purpose being to iluminate a north side wall of a house to decrease mold growth. - One single large convex mirror, or an array of many small convex mirrors (equal in mirror area) - Which choice will reflect more sunlight to the dark wall for a decent number of sunlight hours and angles daily ? Or is there a preferred shape as ellipsoidal for the task ?
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