Perhaps - but if you attempted to start you WM or DW and it didn't come on, that would presumably prompt you to operate the switch - so I'm far from convinced!If your the sort of person that likes turning your washing machine and dish washer off at night. (Or before you leave the house) then fit a neon.
Kind Regards, John
I was thinking along the lines of,
If the neons lit, then it reminds one to switch it off.