Adafruit TSL2591 High Dynamic Range Digital Light Sensor [STEMMA QT] : ID 1980 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Retired - TSL2561 digital luminosity / lux / light sensor [SPL-ADA-439] - $7.95 : SpikenzieLabs, Great electronics kits
Adafruit TSL2561 Digital Luminosity/Lux/Light Sensor Breakout [ADA439] : Amazon.ca: Electronics
SciELO - Brasil - Determination of Low-Cost Arduino Based Light Intensity Sensors Effectiveness for Agricultural Applications Determination of Low-Cost Arduino Based Light Intensity Sensors Effectiveness for Agricultural Applications