What Lighting Controls Does the Energy Code Require?

Energy-code lighting controls are the automatic and manual control strategies the code mandates: scheduled or occupancy-based automatic shutoff, occupancy/vacancy sensing in enclosed spaces, multilevel lighting controls, and daylight harvesting where fenestration provides useful daylight. The lighting design documents the control intent per space type, the power allowances, and the commissioning of the controls. The design has two halves that must agree: the lighting power calculation proving the installed wattage is within allowances, and the controls narrative proving every space has its required control strategy. A beautiful power calculation with a vague controls story gets corrections. I document both with the same rigor.

Automatic shutoff is the foundation — no space should stay lit indefinitely with nobody in it. That means time-scheduled control, occupancy sensors, or a signal from another system, with manual override where the code allows. Enclosed offices, restrooms, storage rooms, and similar spaces get occupancy or vacancy sensing as a matter of course. Multilevel control gives occupants more than on/off — stepped switching or continuous dimming in the spaces the code lists. Daylight-responsive controls cover the daylit zones: primary and secondary sidelit areas near windows, and top-lit areas under skylights, each with photosensor control that reduces electric light as daylight rises. Exterior lighting gets its own treatment: photocell plus scheduling or motion sensing, with the code's power and curfew provisions. Each layer gets shown on the plans with a sequence of operation the installer can actually build.

Lighting controls are notorious for being installed but never properly set up — sensors with factory-default timeouts, daylight zones that were never calibrated, schedules nobody programmed. The energy code increasingly requires functional testing and commissioning of the controls, and I specify it: sensor calibration, sequence verification, and documented setpoints handed to the owner. The compliance package includes the lighting power calculations by the code's method, the controls narrative keyed to the floor plans, the fixture and control equipment schedules, and the commissioning requirements. In California, this all feeds the Title 24 lighting compliance documentation. A controls package that's designed, documented, and commissioned actually saves the energy the code promises — which is the whole point.

• Automatic shutoff: scheduled or occupancy-based, so empty spaces don't stay lit
• Occupancy sensing: required in enclosed offices, restrooms, storage, and similar spaces
• Multilevel control: dimming or stepped switching beyond simple on/off
• Daylight response: photosensor control in sidelit and top-lit daylit zones
• Commissioning: calibrated sensors and verified sequences, documented for the owner