FlickerSpec: LED Light Auditor

iPhone / Utilitaires

FlickerSpec is the professional flicker measurement tool built for clinical engineers, biomedical engineers, lighting designers, and facility managers who need documented, standards-compliant results — not just a number on a screen.

WHAT IT MEASURES

FlickerSpec measures Percent Flicker and Flicker Index per IEEE 1789-2015 using your iPhone camera at 240fps — identifying the dominant flicker frequency, computing signal-to-noise ratio, and delivering a confidence rating so you know when a measurement is reliable.

For regulatory work, FlickerSpec v1.2 adds IEC Certified Measurement: a 3-minute tripod-based capture that produces a Short-Term Flicker Severity (PstLM) value per IEC TR 61547-1:2015 — the metric cited by EU Ecodesign 2019/2020, ANSI C82.77-6-2023, and WELL Building Standard V2.

BUILT FOR COMPLIANCE DOCUMENTATION

Every measurement can be saved to a session with a location label, fixture photo, GPS coordinates, and notes. When your audit is complete, FlickerSpec generates a professional PDF report with the measurement results, IEEE 1789-2015 Pass/Fail, PstLM + EU Ecodesign verdict where applicable, the FFT spectrum, the fixture photo, and your calibration certificate reference — the documentation standard expected by clinical engineering departments and accreditation surveyors.

CALIBRATION SYSTEM

FlickerSpec includes a free companion calibration web app. Before your audit, point your iPhone at the companion app running on any monitor or laptop. FlickerSpec captures the known-frequency signal, verifies accuracy, and generates a timestamped calibration certificate that attaches to all subsequent reports.

LIVE MEASUREMENT DISPLAY (FREE)

The free tier includes the full live measurement display — real-time luminance waveform, FFT spectrum, dominant frequency readout, confidence indicator, achieved frame rate — plus up to 5 measurements per day. All raw metrics (Percent Flicker, Flicker Index, frequency, SNR, confidence) are visible on every measurement. IEEE 1789-2015 Pass/Fail verdict, IEC Certified Measurement, measurement logging, reporting, and calibration require Pro.

PRO UPGRADE — $149.99 ONE-TIME

One-time purchase, no subscription:
- Unlimited daily measurements
- IEEE 1789-2015 Pass/Fail on every measurement
- IEC Certified Measurement (PstLM per IEC TR 61547-1:2015)
- Measurement logging with GPS, photos, location labels
- Single-measurement and session-summary PDF reports (with PstLM + EU Ecodesign section)
- CSV export
- Calibration certificate generation and storage
- Report header customization with your company name and logo

TECHNICAL SPECIFICATIONS

- Quick Measurement: IEEE 1789-2015, 240fps, manual exposure lock
- IEC Certified Measurement: 3-minute tripod capture, 8× oversampled flickermeter at 1920 Hz, full Annex A LM weighting filter, validated against all 5 IEC TR 61547-1 Table A.1 vectors
- Metrics: Percent Flicker, Flicker Index, dominant frequency (Hz), SNR (dB), PstLM, confidence rating
- Report format: PDF via PDFKit, exportable via iOS share sheet
- Storage: on-device only, no cloud dependency

REFERENCE STANDARDS

IEEE 1789-2015 — Recommended Practices for Modulating Current in High-Brightness LEDs for Mitigating Health Risks to Viewers
IEC TR 61547-1:2015 — Equipment for general lighting purposes — EMC immunity requirements — Part 1: Measurement method for flicker (Annex A defines the LM flickermeter and PstLM computation)
EU Ecodesign 2019/2020 — Single lighting regulation, PstLM ≤ 1.0 acceptance threshold
ANSI C82.77-6-2023 — AC-DC and DC-DC power supplies, flicker of general lighting products
ANSI/IES TM-39-25 — Method for measuring temporal light artifacts
IES RP-28 — Lighting for Healthcare Facilities

Quoi de neuf dans la dernière version ?

IEC Certified Measurement (Pro):

FlickerSpec now produces a Short-Term Flicker Severity (PstLM) value per IEC TR 61547-1:2015 — the metric cited by EU Ecodesign 2019/2020, ANSI C82.77-6-2023, and WELL Building Standard V2. Mount your iPhone on a tripod, aim at the fixture, run a 3-minute capture, and FlickerSpec returns a PstLM value with a clear PASS/FAIL against the PstLM ≤ 1.0 threshold.

The PstLM result appears on the Log Measurement screen and in the single-measurement PDF report, alongside the existing IEEE 1789-2015 verdict. Quick Measurement (the live handheld IEEE 1789 flow) continues unchanged.

Under the hood: 8× oversampled flickermeter at 1920 Hz, full 6-biquad LM weighting filter cascade, 60-second settling discard, IEC-smoothed percentile bank, validated against all 5 IEC TR 61547-1 Annex A Table A.1 test vectors within ±5%.