This page is kept for historical interest. It may document projects or methods that are obsolete and/or no longer relevant. The information here is not kept up-to-date.
I used this module to control the LED lights in my first apartment.
LSU mounted in the living room.
This module measures the light intensify and shows this on a scale from 0 to 782 on the LED display. By multiplying the shown value with 5, and then divide by 127 you get the light intensity in µW/cm2. The threshold value is shown while it's being adjusted, if the light intensity rises over/or falls below (optional) the output will be activated. The hysteresis is +-25. Only one digit is shown on the LED display at any time, but the speed is so fast that me see it as three stable digits.