R&D

CLTC completes more than 100 demonstrations of energy-efficient lighting

05/12/2010

CLTC – The California Lighting Technology Center (CLTC), a research, development, and demonstration facility at the University of California, Davis, has installed more than 100 demonstrations of energy-efficient lighting since the Center’s inception in 2004. The wide range of demonstrations has been installed at University of California, California State University, California Community College campuses, and state and federal buildings throughout California in an effort to prove energy-efficient technology and report the findings to the public through case studies. 

Lighting Innovator Assumes First Rosenfeld Chair in Energy Efficiency

05/03/2012

UC Davis – Michael Siminovitch, director of the California Lighting Technology Center, has been named the first Arthur H. Rosenfeld Chair in Energy Efficiency at the University of California, Davis. The designation honors both Siminovitch, a professor of design whose work is revolutionizing lighting throughout California, and Rosenfeld, considered the “father of energy efficiency.”

Lighting innovator assumes first Rosenfeld Chair in Energy Efficiency

New Dual-Loop Lighting Control Improves Daylight Harvesting and Energy Efficiency in Spaces with Skylights

03/01/2013

CLTC – Lighting control manufacturer WattStopper has launched a breakthrough advance in electric lighting control technology for daylight harvesting. The LMLS- 600 dual-loop photosensor control is the first device on the market to combine open-loop and closed-loop photo sensing strategies, greatly improving the accuracy and reliability of daylight sensing in spaces with skylights. The device is the result of research and development conducted in the labs of the California Lighting Technology Center (CLTC), part of the University of California, Davis. 

Ubiquitous Communication by Light

Ubiquitous Communication by Light

Ubiquitous Communication by Light (UC-Light) is an emerging technology that uses visible light to perform wireless machine-to-machine communication. The mechanism at work with UC-Light is similar to the infrared technology used in TV remote controls, but UC-Light uses visible white light from modulated light emitting diodes (LEDs). Visible light communication (VLC) is potentially cheaper than conventional wireless communications because VLC can use pre-existing LED luminaires for communication purposes.

Algorithms for Advanced Lighting Control & Energy Management

Algorithms for Advanced Lighting Control & Energy Management

With support from a CITRIS seed grant, researchers at CLTC and UC Berkeley are working together to develop advanced lighting control algorithms that make use of multiple data streams, both local and remote, to improve lighting and energy management in buildings. Applications include electrical lighting systems in commercial spaces with windows and/or skylights.

Core Sunlighting Systems

Solar Canopy for Core Daylighting

Core sunlighting systems deliver sunlight deep into multi-story building cores, where daylight is not available through skylights or windows. An effective core sunlighting system offers physiological and psychological benefits to occupants while dramatically improving the quality and color rendering of lighting, reducing lighting electricity use up to 75%, and reducing electricity loads during peak demand periods.

Daylight Optimization for Skylights

Daylight Optimization for Skylights

CLTC is evaluating dynamic skylight systems that automatically adjust light transmission to minimize glare and manage solar heat gain, significantly improving both lighting quality and energy savings. Engineers are using one of the Center's integrating spheres to measure the transmittance of different sample units.

Applications include residential and commercial spaces that receive sufficient sunlight to require some form of shading for occupant comfort or to prevent solar heat gain.

Dual-Loop Photosensor Control System for Daylight Harvesting

Dual-Loop Photosensor Control System for Daylight Harvesting

Photosensor control systems have been available for more than two decades, but they have struggled to gain widespread use due to issues with reliability. To address these issues, CLTC partnered with WattStopper, Walmart, Sacramento Municipal Utility District, Southern California Edison, and San Diego Gas & Electric Company to develop a more reliable, more effective daylighting control system capable of sensing changes in daylight levels with increased accuracy and responding with more appropriate adjustments in electric light levels.

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