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ASHRAE Nonresidential Lighting Controls

Stakeholder Meeting

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As part of the Statewide CASE Team effort, we invite you to join our stakeholder process regarding the Nonresidential Lighting Controls building energy efficiency topic. By clicking on the following link and completing the form, you will receive email updates on this CASE topic.

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Measure Overview

The Lighting Power Densities (LPD) in Title 24 are subject to change as new technologies (in particular, light source technologies that increase lamp efficacy) become available to the market. As a result, the LPD values continue to be revised downward over time in response to these technological advancements.

ASHRAE 90.1-2013 has recently adopted LPD values for several building spaces that are similar to Title 24 LPD values. While 90.1 and Title 24 aren’t always directly comparable, there is widespread compatibility of the allowances in the two documents. Title 24 is required to have an energy code that is at least as stringent as the national energy code, however, ASHRAE 90.1-2013 is more stringent in some cases.

This measure intends to make LPD adjustments to a selection of space categories and whole building values to reflect the values that have been established by ASHRAE 90.1 in their consensus-built document.

The spaces currently identified as candidates for revision, and the ASHRAE 90.1-2013 LPDs are:

Space Type ASHRAE 90.1-2013 LPD
Auditorium various, depending on application;
0.63 W/SF for auditorium
Auto Repair 0.67 W/SF
Civic Meeting Place various, depending on application;
0.81 W/SF for confinement cells
Convention, Conference, Multipurpose, and Meeting Center various, depending on application;
1.23W/SF for conference room
Dining Area various, depending on application;
0.65 W/SF for cafeteria
Exercise Center, Gymnasium various, depending on application;
0.72 W/SF for exercise area
Electrical, Mechanical, Telephone Rooms 0.42 W/SF
Exhibit, Museum various, depending on application;
1.05 W/SF for general exhibit
Financial Transaction 1.01 W/SF
Library – Reading Room 1.06 W/SF
Locker / Dressing Room various, depending on application;
0.61 W/SF for dressing room
Lounge various, depending on application;
0.92 W/SF for lounge in healthcare facility
Malls and Atria various, depending on RCR
Medical and Clinical Care support spaces not specifically listed
Religious Worship fellowship hall, not worship area
Laundry 0.6 W/SF
Transportation Function various, depending on function;
0.80 W/SF at ticket counter

Buildings that include a large portion of these candidate space types may also be subject to LPD adjustments based on the component spaces.

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