Introduction

Reading room interior
The Knight Library's Special Collections and University Archives Reading Room was the "upperclassmen's reading room" of the original Lawrence Ellis-designed library.  Facade of Knight Library
Picture of Window
Like most older reading rooms, it is daylit, a high-ceilinged room with tall north-facing windows; a rough guess makes the ceiling perhaps 25 feet high, with the windows starting at perhaps six feet off the ground and continuing upward for perhaps 18 feet. The windows are surrounded by tall, deep bookshelves, which provide glare-reducing reveals. 
Some years ago, the room was restored, and two rows of hanging indirect luminaires were installed, replacing what was apparently a different system with three rows of hanging luminaires, one row in each channel of the coffered ceiling; the original mounting points are still visible.  Luminaire

Forward to hypothesis.