My Grandkids and Daughter moved in with us in June of last year. It was a constant battle with getting them to turn lights off. I went through and replaced all of the bulbs in the house with LED bulbs when Menards had them on sale and 11% rebate. The cost was under $2 each.
It isn't as much about instant savings as it is about me not having to yell "Turn off the cotton picking lights, money doesnt grow on trees". Oh crap I've turned into my father.
Another benefit is being able to run my whole house off the generator when the grid power goes down. Gas range, furnace, water heater and fireplace means the 5500 watt genny does just fine to run water pump, furnace, fridge, freezer, TV's and lights.
My spouse has no idea that the light switch will actually go the other way once put in the on position.
We have had classes on the proper use of the modern light switch to no avail.