Performance Assessment of Integrated Core Daylighting Technology

A previous CEC funded project ( https://cltc.ucdavis.edu/sites/g/files/dgvnsk12206/files/media/documents/LDA-June-2022-Edit.pdf) has demonstrated the potential of a fiber optic, solar-tracking core daylight system to deliver natural lighting into the building at ~620 lumens/watt at a maximum length of 300 feet when direct sunlight is available. While this system efficacy is significantly higher than the best SSL technology available today, this technology requires extensive refinement in the area of electric lighting controls and photometric integration if these savings are to be realized in practice. This CalNEXT project is focused on advancing the viability of solar-tracking core daylighting systems as energy efficiency measures through the refinement of the electric lighting controls integration, optical system integration, and on evaluating the potential for the solar tracking core daylighting system efficacy to scale upwards of 1000 lumens/watt based on a previously unevaluated version of the product.