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The Solar Decathlon is a project of the U.S. Department of Energy (DOE) in partnership with DOE's National Renewable Energy Laboratory (NREL).

Illumination & Daylighting: 11#

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The light team developed a series of virtual simulations to optimize the interior and exterior lighting values for the house. A range of 3D radiosity-based point-by-point imaging solutions was formed to give a continuous light rendition throughout the day and into the night.

Through these models and simulations, the design team derived a lighting solution that balances between poetic and dramatic appearances. This solution works well with the design of the house as it oscillates between opacity, translucency and transparency. As depicted in the AGI32 renders, rather than being designed as a dark cloud over light thermal volume, the solar array serves a reflective capacity.

Light reflected from the white cool roof and the reflective underside of the solar tracking roof permeates through the north facing skylights. Striations of light penetrate the thermal roof between panels of BIPV to create a direct doubling effect of indirect and direct sunlight inside of the house. The direct correspondence between the adaptable roof form and the interior lighting volume form a floating thermal roof and perforated light tube that appear to be supported by a continuous ribbon of glass.