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Nonresidential Indoor Lighting Power Densities (LPDs)


Measure Overview

The Indoor LPDs measure is intended to revise the lighting power allowances assigned in Tables 140.6-B, 140.6-C, 140.6-D, and 140.6-G to adjust the values to be comparable in energy efficiency to the levels presented in ASHRAE 90.1-2013 if they prove to be cost effective.

As the process of evaluation is not intended to challenge the quality or nature of the lighting equipment employed to establish the allowances, there is no anticipation that the changes will trigger an issue with cost effectiveness.

These space type categories that appear to have an opportunity for revision include:

  • Auditorium Area
  • Auto Repair Area
  • Convention, Conference, Multipurpose, and Meeting Center
  • Dining Area
  • Electrical, Mechanical, Telephone Rooms
  • Exhibit, Museum Areas
  • Financial Transaction Area
  • Hotel Function Area
  • Kitchen, Food Preparation Areas
  • Laundry Area
  • Library Area – Reading Areas
  • Lobby Area – Main Entry Lobby
  • Lobby Area – Hotel Lobby
  • Locker / Dressing Room
  • Lounge Area
  • Malls and Atria (based on RCR issues)
  • Transportation Function Areas
  • Waiting Area
  • “All Other Areas”

This measure will review the recommendations for the general illuminance portion of the Tailored Method as provided in Table 140.6-G. This table will be revised to incorporate the newest light source technology as required in the code (HP T8 lamps), plus the inclusion of LED lighting products where these have become the industry standard (replacing low-wattage CFL downlights).

This measure may also incorporate recommendations intended to streamline the code language, in particular for the alterations segment of the code (Section 141.0) if there are recommended modifications.

Stakeholder Meeting

Several stakeholder meetings and CEC staff workshops were held regarding the Nonresidential HVAC Economizer Modifications building energy efficiency topic. The list of past meetings and hearings can be found here. If you would like to receive email updates on this CASE topic, click the link below.


  1. Final CASE Report