Electrical engineering toolbox
Lux / Light Level Meter
Camera-based relative light-level estimate with center-weighted sampling, PWM smoothing, optional one-point lux calibration, and a frame-rate-limited flicker FFT. Not a photometer. On-device camera only.
About this calculator
Camera-based relative light-level estimate with center-weighted sampling, PWM smoothing, optional one-point lux calibration, and a frame-rate-limited flicker FFT. Not a photometer. On-device camera only.
For design, installation, or safety decisions, verify assumptions against the applicable code edition, equipment documentation, and site requirements.
Open the interactive tool