The Adafruit TSL2585 Digital UVA and Ambient Light Sensor is a great "three-in-one" light sensor that  has ambient light sensing, Infrared channel and UVA (315nm-400nm). In particular its not that common to get UVA narrow-band sensing on an I2C sensor, so this is great for outdoor light monitoring. It can also be used to measure curing lights, blacklights and reptile lamps! Please Note: this sensor will give 'counts' for the ambient light sensor, and is not lux calibrated, so you can use it for measurements but it...