Trophy Case CRI R9 Lighting Check for Accurate School Reds
Intent: research — a trophy case CRI R9 lighting check determines whether the LED fixtures illuminating a school award display reproduce saturated red accurately enough to show crimson jerseys, scarlet ribbons, maroon championship banners, and red-accented trophies at their true color. R9 is the supplementary metric in the IES color rendering framework that specifically scores a light source’s rendering of deep, saturated red — a hue that the standard CRI calculation (R1–R8) does not test at all. Many LED products achieve CRI 80 or higher while carrying an R9 value below 20, which is low enough to shift red-dominant objects toward brown or orange and drain the vibrancy from school colors that include any crimson or scarlet component.
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