An apparatus for illuminating a target surface, the apparatus having a plurality of LED arrays, where each of the arrays has a plurality of individually addressable LEDs, and where at least one of the arrays is disposed at an angle of between about forty-five degrees and about ninety degrees relative to the target surface, where all of the arrays supply light into a light pipe, the light pipe having interior walls made of a reflective material, where light exiting the light pipe illuminates the target surface, and a controller for adjusting an intensity of the individually addressable light sources.