Publications

IES LD+A Research Matters: Studying chromaticity binning - what should we expect from today’s LED light sources?

08/15/2019

Generally, people expect two light sources with the same rated color appearance to appear identical when installed in their homes and businesses. Obvious variation often leads to dissatisfaction, complaints and product returns.  To avoid these issues, it is important that light sources have sufficient chromatic consistency to ensure color matching for most people.  Currently, the lighting industry relies on binning for correlated color temperature (CCT) and Duv to address this issue.

IES LD+A Research Matters: Circadian Lighting Design - Leveraging the Melanopic Efficacy of Luminous Radiation Metric

05/06/2019

Lighting design projects often include multiple design constraints. For example, a lighting design should meet target light levels, limit glare and provide appropriate color fidelity while not exceeding the power or energy budget defined for the project. For select projects, circadian considerations have recently been added to the design criteria list. Circadian lighting is defined as lighting that influences a non-visual, physiological response within the human body.

Nonresidential Lighting: What's New in 2019 Title 24, Part 6 Energy Code?

02/04/2019

California's new nonresidential Building Energy Efficiency Standards take effect on January 1, 2020. The 2019 Energy Standards focus on several key areas to improve the energy efficiency of newly constructed buildings, additions and alterations to existing buildings.  Significant changes in the 2019 Energy Standards address ventilation, HVAC, demand response and lighting. Notably, the 2019 Energy Standards now include requirements for healthcare facilities, although there are many exceptions for this building type.

Major Changes

IES LD+A Research Matters: California's 'Million LED Challenge' Sets an Ambitious Goal

11/14/2018

This year, California demonstrated leadership as the first state in the country to set appliance efficiency regulations for general service lamps that ensure both lighting quality and efficiency.  To build on this leadership and accelerate the adoption of the high-quality, energy efficient LED lamps, in July 2018 the University of California launched a new procurement program known as The Million LED Challenge.  The program supports the UC Office of the President’s Carbon Neutrality Initiative, which commits the UC to emitting net zero greenhouse gases from its buildings and vehicle fleet b

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