For setting the ambient brightness value to differ from day time to night time. It will be defined
as “day time”. If the ambient brightness value exceeds the set value; it is otherwise known as
“night time” (position 0 equals 3 LUX).
NOTE: Please do not put the Lux knob at max position, maybe at half position is a good choice for the first using. A max Lux setting will
make the light even come on during daytime