Here is a test rendering scene with our "Candela Light 360". Candela is the SI base unit of luminous intensity; that is, luminous power per unit solid angle emitted by a point light source in a particular direction (Wiki). We use a semi automatic function ( 0= night or non light source, 40.000 bright light day without clouds). In this example we used the factor 19.000 for a cloudy day (overcast) .... :)