The Adafruit VEML7700 is a high-accuracy ambient light sensor from Vishay that outputs calibrated lux values over I2C. Unlike basic light sensors that return unitless brightness readings, the VEML7700 calculates lux (an SI unit), giving you consistent and comparable measurements across multiple sensors.

With a 16-bit dynamic range covering 0 to approximately 120,000 lux and resolution down to 0.0036 lx/ct, this sensor handles everything from dim indoor lighting to bright sunlight. Software-adjustable gain and integration times let you optimise for your specific lighting conditions.

Key Features

• Calibrated Lux Output – Direct lux readings in SI units for consistent measurements
• 16-Bit Dynamic Range – 0 to ~120,000 lux with 0.0036 lx/ct resolution
• Adjustable Gain & Integration Time – Software-configurable for different lighting conditions
• I2C Interface – Simple two-wire communication
• 3.3V and 5V Compatible – On-board 3.3V regulator and logic level shifter
• Compact Breakout – Small PCB with all support circuitry

Ideal For

• Automatic display brightness adjustment
• Weather stations and environmental monitoring
• Smart lighting and home automation
• Agricultural and greenhouse light measurement
• Photography and studio light metering

Package Contents

• 1× Adafruit VEML7700 Lux Sensor Breakout (assembled and tested)
• 1× Header strip (requires soldering)

Resources

• Arduino Library (GitHub)
• CircuitPython / Python Library (GitHub)