Guide

How to prepare for your Title 24 lighting-controls inspection

A practical checklist to get your lighting-controls acceptance testing done and documented before inspection.

7 min readUpdated July 3, 2026Reviewed by NLCAA
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Before you start: this is practical guidance, not legal advice. For the full acceptance-testing procedure, take the NLCAA course.

The six steps to a smooth inspection

A failed lighting-controls inspection usually traces back to something that could have been caught before the inspector arrived. Work through these steps in order:

  1. 1

    Make sure your tester is certified

    The person running the tests must be a certified Acceptance Test Technician (ATT) working under a certified Acceptance Test Employer (ATE). Not sure of the difference? See ATT vs ATE.

  2. 2

    Confirm the installed controls match the approved plans

    Before any testing, verify that the lighting controls actually installed on the job are the ones the approved plans call for.

  3. 3

    Verify each control type functions

    Walk each control type and confirm it operates — occupancy, daylighting, automatic shut-off, and multi-level controls.

  4. 4

    Complete the required acceptance-test documentation

    Fill out the acceptance-test forms the building department will ask for — incomplete paperwork holds up approval just as much as a failed test. NLCAA's Acceptance Testing Software generates this documentation for you and runs the required calculations automatically, so there are no manual math errors to hold up sign-off.

  5. 5

    Schedule and perform the acceptance test

    Have your certified ATT run and document the functional tests, leaving time to correct and re-verify anything that fails.

  6. 6

    Submit the documentation to the building department

    Turn in the completed acceptance-test documentation so the department can approve the lighting-controls work.

Common failure points

The same few problems cause most failed lighting-controls inspections:

  • Sensors wired but not commissioned — they power up but never got configured for the space.
  • Daylighting controls not calibrated, so the electric lighting doesn't respond to available daylight.
  • Missing or incomplete documentation — the testing happened, but the forms can't prove it.

Software that prevents errors

Most of the failure points above come down to two things: manual calculations and incomplete documentation. NLCAA built a CEC-approved Acceptance Testing Software to take both off the technician's plate:

  • No manual math — the software runs every required calculation, removing the human error that fails inspections.
  • All documentation in one place — it generates the acceptance-test forms and records automatically as you test.
  • Web-based, so it works from a phone or tablet right on the job site.
  • CEC-approved and updated every code cycle (roughly every three years) with the new Energy Code rules.

Web-based and mobile: your technicians run the whole test from a phone or tablet in the field, while the software does the calculations and builds the documentation as they go. It's CEC-approved and updated every code cycle, so it always reflects the current Energy Code — and it's part of the NLCAA program once your team is certified.

Walk into inspection prepared

Learn the full test procedures in an NLCAA course, or get your crew certified.