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Indoor Controls

Nonresidential Lighting

Codes and Standards Enhancement (CASE) Report

The Statewide CASE Team is requesting feedback on the 2019 Title 24, Part 6 Draft CASE Reports. The CASE Report presents pertinent information that supports the code change proposal. Please email feedback to You may also submit written comments to the Energy Commission. See the agenda for Energy Commission pre-rulemaking workshop (available here) for instructions on how to submit comments to the Energy Commission’s docket.

Draft CASE Report: Nonresidential Indoor Lighting Controls

Measure Description

Mandatory Automatic Daylight Dimming Plus OFF Controls

This measure proposes to require nonresidential automatic daylight dimming controls to include the OFF step to align with ASHRAE 90.1-2016. The proposed daylighting dimming plus OFF control step will be mandatory and apply to the luminaires in the Primary Sidelit Daylit Zone and Skylit Daylit Zone. The prescriptive approach for new construction and nonresidential lighting alteration projects would require luminaires in the Secondary Sidelit Daylit Zone, in addition to the Primary Sidelit Daylit Zone and Skylit Daylit Zone, to have daylight dimming plus OFF control step. This measure also proposes to update the existing Title 24, Part 6 Power Adjustment Factor (PAF) for daylight dimming plus OFF controls to only be applicable to areas that are proposed to be exempt in Section 130.1(d)2C.

Mandatory Occupant Sensing Full OFF Controls in Nonresidential Restrooms

This measure proposes mandatory occupant sensing full OFF controls in nonresidential restrooms with multiple stalls to be more aligned with ASHRAE 90.1.

Manual ON Commissioning for Automatic Time-Switch Controls 

This measure proposes that automatic time-switch controls, should they be used to comply with Section 130.1(c), be commissioned as manual ON. This proposal would exempt automatic time-switch controls used in the following function spaces: industrial, single tenant retail, malls, auditoriums, concourses, lobbies and other areas open to the general public. This measure will reduce the amount of time that nonresidential indoor lighting is turned ON when there are no occupants present in the space.

Request for Feedback

The Statewide Utility Team encourages participation in the CASE Report development process through the submission of data—both primary sources and references to existing data. We are requesting data on areas such as energy savings, costs, market impacts, industry practices, barriers to code compliance, etc. from stakeholders. The data will inform the energy savings estimates, cost-effectiveness analysis, compliance and enforcement, and market impacts that will be presented in CASE Reports. Do you have feedback or data to share? Send us an email at

California Statewide Utility Codes and Standards Program

This program is funded by California utility customers and administered by Pacific Gas and Electric Company, Southern California Edison, San Diego Gas and Electric Company, Southern California Gas Company, Sacramento Municipal District, and Los Angeles Department of Water and Power in preparation for the California Energy Commission’s Codes and Standards Buildings Advocacy.