Light Meter Pro - Lux Measure

Light Meter Pro turns your iPhone or iPad camera into an everyday light reference tool.

Measure light levels on desks, reading pages, screen environments, as well as photography exposure and plant grow lights. The app estimates Lux, Color Temperature, EV100, PPFD, and DLI, offering clear adjustment suggestions tailored to your current scenario.

Key Features:
- Study & Reading Light Check: Evaluates lighting conditions for desks, books, and screen environments.
- Photography Exposure Reference: Supports shutter speed, ISO, aperture, EV100, and suggested parameters.
- Plant Lighting Estimation: Covers canopy illuminance, PPFD, DLI, and daily light hours.
- Dual Measurement Modes: Supports both front-facing incident light and rear-facing reflected light measurement.
- Custom Calibration: Allows you to adjust metering coefficients by comparing readings with a professional lux meter.
- 100% Privacy-Focused: All processing is done locally on your device. No accounts required, no cloud uploads, and photos are never saved.

Ideal Use Cases:
- Checking ambient light to ensure a healthy environment for children’s homework, reading, or screen time.
- Quickly referencing exposure parameters and EV differences before a photoshoot.
- Determining if indoor plants need supplementary grow lights or a change of location.
- Comparing lighting changes across different lamps, locations, and times of day.

Important Disclaimer:
Smartphone cameras are not metrologically certified lux meters, color temperature meters, spectrometers, PAR sensors, or professional photographic light meters. Light Meter Pro is designed for quick comparisons, home lighting adjustments, and pre-shoot estimates. For lighting compliance inspections, medical assessments, commercial testing, or precision agriculture, please use calibrated professional instruments.