The U.S. Department of Energy recently released a report on the initial performance and reliability of chromaticity sensors used for tunable LED lighting systems.
This study found that a chromaticity sensor used in the control system of a tunable lighting installation has high reliability, even under relatively harsh test conditions. The study examined the initial performance and aging characteristics of a sensor consisting of a series of six photodiodes that respond to different wavelengths to adjust illuminance, correlated color temperature (CCT), and chromaticity.
The sensor devices were exposed to a 5,000-hour accelerated stress test: one group at a continuous room temperature operating life, a second at a continuous but elevated ambient temperature of 75°C, and a third in a temperature-humidity environment of 75°C and 75% relative humidity (also known as a 7575 environment).
No abrupt failure of the sensor was found after 5,000 hours of testing, even in the relatively harsh 7575 environment. Just one parametric failure after 5,000 hours of 7575 testing was observed. Such a failure produces a change in a tunable device that would be noticeable to an observer. Light from the tunable fixture would likely be blue-shifted.
Related Stories
Esports Arenas | May 11, 2022
Design firm Populous partners with esports company on digital art NFT collection
Design firm Populous and multidiscipline esports organization Kansas City Pioneers have partnered on a five-part NFT collection.
Market Data | May 10, 2022
Hybrid work could result in 20% less demand for office space
Global office demand could drop by between 10% and 20% as companies continue to develop policies around hybrid work arrangements, a Barclays analyst recently stated on CNBC.
Standards | May 9, 2022
New GSA standards set carbon limits on building materials for all major projects
New General Services Administration standards place limitations on high carbon-emitting building materials for all major projects under the GSA umbrella.
Higher Education | May 5, 2022
To keep pace with demand, higher ed will have to add 45,000 beds by year-end
The higher education residential sector will have to add 45,000 beds by the end of 2022 to keep pace with demand, according to a report by Humphreys & Partners Architects.
Legislation | May 4, 2022
Washington is first state to mandate all-electric heat for new large buildings
Washington recently became the first state to require all electric heat for new buildings.
Sponsored | Healthcare Facilities | May 3, 2022
Planning for hospital campus access that works for people
This course defines the elements of hospital campus access that are essential to promoting the efficient, stress-free movement of patients, staff, family, and visitors. Campus access elements include signage and wayfinding, parking facilities, transportation demand management, shuttle buses, curb access, valet parking management, roadways, and pedestrian walkways.
Codes and Standards | May 3, 2022
American Institute of Steel Construction updates environmental product declarations
The American Institute of Steel Construction has released updated environmental product declarations (EPDs) “to help designers and building owners design more environmentally friendly buildings and bridges,” according to an AISC news release.
Codes and Standards | May 2, 2022
Developer Hines, engineer MKA develop free embodied carbon reduction guide
Real estate management and investment firm Hines has released the Hines Embodied Carbon Reduction Guide. The free guide, produced with Magnusson Klemencic Associates (MKA), is the result of a two-year effort, relying on MKA’s industry-leading knowledge of carbon accounting and involvement in programs such as the Embodied Carbon in Construction Calculator (EC3) Tool.
Codes and Standards | Apr 28, 2022
Architecture firm Perkins&Will to deliver ‘carbon forecasts’ for clients
Global architecture firm Perkins&Will says it will issue its clients a “carbon forecast” for their projects.
Codes and Standards | Apr 27, 2022
White House guidance on Buy American for infrastructure includes waiver process
Recently released guidance on the Buy American provision within the $1.2 trillion Infrastructure Investment and Jobs Act released by the Office of Management and Budget includes a waiver process.
