The 2025 California Energy Code (Title 24) clarifies lighting and control requirements for single-family residential buildings. Here is a summary of the lighting changes: § 110.9: Lighting Controls and Components. All lighting control devices and systems, light sources, and luminaires must meet the applicable requirements of §110.9. § 150.0(k)1A: Luminaire Efficacy. All installed luminaires and light [...]













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