Measure Description
The Lighting Power Densities (LPD) in Title 24, Part 6 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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