Partnering with pioneering developers to pilot next-generation daylighting
Retro Solar & Köster Lightplanning have partnered with leading universities to advance mirror-optic daylighting. We’re now seeking pioneering collaborators for the next generation of daylighting research — studying real buildings to quantify daylight gain, comfort, and ROI.
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proven success in flagship projects across 11 countries
Advancing the Daylighting Frontier
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RETROSolar daylighting uses mirror-optic louvers to channel daylight deep into buildings while reflecting unwanted heat outdoors. The result: bright, glare-free interiors with lower cooling and lighting costs.
The next level of groundbreaking daylighting research: our researchers will study your building for daylighting gain and ROI.

6.5M
square feet of demonstrated projects around the world.
11
Countries with RETROSolar projects implemented.
35+
Years of experience implementing daylighting systems.
5%
Achieving the lowest G (SGHC) values across our product lines.
