In this code yes it may have some numbers as you sad 40, but I have tried zeros.
In the morning the dimming can start from zero=or very low dim but at evening when the dimming goes down towards zero the display shows the lowest value but the LED's are still up on some higher level not on low dim....I power restarted the system and when the lights come ON will dim low. This means for some reason the communication between the bard and expansion module and LED drivers keeping some buffer current driving the LED's higher then the slope value.
Last weeks do to my RA+ board failure I had to built in couple manual ON/ON switches to overdrive manually, and when I turned the potentiometers down to zero I was able to completelly turn down the LED's to OFF.