A simple cut off switch on the low running light position would do it.
I added a smalls set of 'ditch lights' on mine and contemplating tapping a back up light set up off of the hot lead for them.
I could probably just wire them in as a dual set but sometimes I like to complicate matters for fun.
I dont see the need for lighting up china with the reflection of humongous lightbars casting shadows on the moon so I tend to stay more discreet myself.
Not that Im worried about people seeing me, but so I can see the ditch. hehe.
But there are times when I want to fly low and with minimal disturbance myself.
Ive never been fond of "always on" lighting anyway.
With a bit of care it shouldnt be hard to rig up a simple mount for a mometary contact switch on the Reverse notch. theres plenty of metal support under the plastics.