I was "playing" with the PmodALS Light Sensor in my home office. The program was set to output the light sensor reading once each half second and these are the readings I saw: "27, 27, 23, 28, 10, 30, 4, 32, 5, 31, 10" . Needless to say, I was disappointed with the fluctuations of the light sensor output readings.
Then I remembered that I had recently changed my office lighting to efficient "dimmable" LED light replacements. I began to suspect that the sensor is fast enough to take a sample when the LED lights are off. So I turned off the office lights and illuminated the sensor with a