Skip to main content
Project Info ACTIVE Project Title

Performance Assessment of Integrated Core Daylighting Technology

Project Number ET23SWE0051 Organization SWE (Statewide Electric ETP) End-use Lighting Sector Commercial Project Year(s) 2023 - 2026
A previous CEC funded project ( 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.
  • Pacific Gas & Electric Company logo
  • Southern California Edison Company logo
  • Southern California Gas Company logo
  • San Diego Gas & Electric Company logo
  • Sacramento Municipal Utility District logo
  • Los Angeles Department of Water and Power logo
  • CEC logo

Copyright © 2024 Energy Transition Coordinating Council. Trademarks are the property of their respective owners. All rights reserved.

The ETCC is funded in part by ratepayer dollars and the California IOU Emerging Technologies Program, the IOU Codes & Standards Planning & Coordination Subprograms, and the Demand Response Emerging Technologies (DRET) Collaborative programs under the auspices of the California Public Utilities Commission. The municipal portion of this program is funded and administered by Sacramento Municipal Utility District and Los Angeles Department of Water and Power.