​California Title 24
California Title 24, Part 6 outlines energy efficiency standards for residential and non-residential buildings. 

​These standards were established in 1978 as a way to address California's growing energy consumption.  The standards essentially comprise California's state energy code and are updated by the California Energy Commission periodically to allow consideration and possible incorporate of new energy efficiency technologies and methods.  The most recent update will take effect on October 1, 2005.

The 2005 Energy Efficiency Standards incorporate many outdoor and controls changes over the 2001 standards.  

They specify power allowances for: 

  • Hardscape, vehicular & pedestrian

  • Ornamental

  • Building entrances, facades, and canopies

  • Outdoor sales areas

  • Signs


They define four types of outdoor zones.

There are some new criteria for cutoff luminaires, and they institute new standards to give owners the ability to turn of 50% of outdoor on facades and in parking lots and outdoor sales areas.

Specifically, Section 130 lays out requirements for controls and equipment in all buildings, with additional requirements for high-rise residential hotel/motel guest rooms.  These guidelines address lamp efficacy standards, require motion sensors, and lamp types.

Section 131 requires mandatory controls.  Area controls and controls to reduce are prescribed.  The section addresses daylit area, interior systems and exterior .

Section 132 defines requirements for circuiting, while Section 146 outlines Prescriptive Requirements for Lighting using the power density approach to calculate power allowances. Power density values can be calculated using the complete building method or the area category method.


California Title 24   California Title 24 Presentation 






California Title 20
In 1980, the California Energy Commission was granted the right to adopt efficiency standards for appliances.  

These standards, under the California Code of Regulations, cover everything from refrigerators and washing machines to air conditioners and .

The California Energy Commission issued a rulemaking to review Title 20 and consider ballast efficacy factors and power factors for T12 lamps, as well as lamp efficacy and color rendering index (CRI) for fluorescent lamps and lamp efficacy for general service incandescent reflector lamps.