The following overview of Title 24’s regulations for non-residential indoor lighting has been provided by California Lighting Technology Center (CLTC):

General Control

  • All lighting control systems with two or more components in non-residential spaces must meet the requirements of 2013 Title 24 standards, Section 110.9
  • Both stand-alone and luminaire-integrated lighting controls, such as vacancy sensors and photocontrols, must now comply with Title 20 regulations
  • All interior luminaires in non-residential buildings must have manual on / off controls, and each area must be independently controlled
  • Dimmer switches must allow manual on / off functionality, with some exceptions such as public restrooms with two or more stalls, which do not need a publicly accessible switch

Multi-Level Lighting Control

  • In areas larger than 100 ft2, installed luminaires must incorporate multi-level lighting controls or continuous dimming, depending on the lamp type
  • Have at least one of the following types of controls for each luminaire:
  • Manual continuous dimming and on / off control
  • Lumen maintenance
  • Tuning
  • Automatic daylighting controls
  • Demand response controls

Classrooms are one of the rare exceptions to the multi-level requirements. Instead, if they have a connected general lighting load ≤ 0.7 W / ft2, they must have at least one control step between 30% and 70% of full-rated power.

Automatic Daylighting Controls

  • The new code requires that floor plans have 75% of their total area in daylight zones, and it applies the rule more broadly, to buildings > 5,000 ft2
  • The code also requires multi-level automatic daylighting controls in all sky-lit or side-lit zones where the installed general lighting power is ≥ 120 W

Occupant Sensing Lighting Control

  • The 2013 code requires occupant-sensing controls that automatically turn off all lighting in the following areas during vacant periods:
  • Offices ≤ 250 ft2
  • Conference rooms of any size
  • Multipurpose rooms < 1000 ft2
  • Classrooms of any size
  • Secondary spaces
  • Indoor parking areas
  • Indoor parking areas, including parking garages, and secondary spaces are new additions

Secondary Spaces

  • Under the 2013 code, occupant-sensing controls must automatically reduce lighting power by 50% in these areas when they are unoccupied:
  • Corridors and stairwells
  • Warehouse aisles and open areas
  • Library book stack aisles ≥ 10 ft in length and accessible from only one end and those ≥ 20 ft in length and accessible from both ends

Security & Egress Lighting

  • The 2013 standards includes the following new requirements:
  • Maximum security and egress lighting allowance of 0.2 W / ft2 when a building is occupied
  • General and egress lighting must be shut off during unoccupied times
  • Exception– Offices are allowed up to 0.05 W / ft2 for lighting during unoccupied periods, but only along emergency egress areas designated on the building plans

Demand Response Controls

  • The 2013 code expands the DR capability considerably, requiring that all non-residential buildings ≥ 10,000 ft2 be capable of automatically responding to a DR signal, so that:
  • Total energy use for lighting can automatically drop to a level at least 15% below the building’s maximum total lighting power
  • Lighting is reduced in a manner consistent with requirements for uniform illumination levels
  • Non-habitable spaces must not be used to comply with this requirement, and spaces with a lighting power density ≤ 0.5 W / ft2 are not counted toward the building’s total lighting power
  • Designers are still responsible for specifying automated controls that are compatible with the local utility’s DR protocol

You also may want to take a look at the following links for further information.