The Art Institute of Chicago commissioned Lux Populi to work with Vinci Hamp Architects on the refurbishment of the Upper Allerton and Gunsaulus Halls, known for their collections of impressionists, and some of the great moments in art presentation in the United States – the Grand Jatte, etcetera. Set in a 19th Century space, the demands on lighting, including daylighting were modern, meaning meeting conservatorial and color rendition standards, in addition to the expectation of the visitor to see the art in all its glory. Daylighting analysis was carried out on site, creating a lighting model for the skylight structure that was then validated against measured values. This allowed reevaluation of daylight throughout the year for managing mean light levels. Existing track and fixtures were reused in the full height spaces, but in the lower height spaces, smaller modern heads were introduced to reduce the visual clutter and allow the artwork a more dominant presence. In addition, new casework was provided for all plastic arts.