Thank you. I think I got the desired effect. But just to clarify, for my own education and others after... I think you gave me two different solutions.
First solution
On the "Main" tab, select the button in the left pane, on the right side, select "Buttons Toggle Mode" , select the button again and select "Toggle On/Off", then select "on" for "Non-Toggle-on". From my understanding this will trigger any programs that use "control is switched on", but it won't make the on state persistent. I also removed the "Set 'Hallway Switch - Goodnight' On 0 / Off 0 (Backlight Level)" line from my program, as with the toggle mode set, the LED light never turns on.
Second solution
The other solutions would have been to leave the toggle mode as it was, but change the final line of my program to activate a scene that sets the button to zero. This will allow the button LED to be lit while the "fade out" is happening, and then turn it off.
I choose the first solution.