Do digital light switches with a pword protection feature exist?

We have a bit of a situation here. When it gets dark out, I turn on the lights on our porch since light is one of the things that deters criminal activity. However, my wife turns it off every night when I am not looking. When I confront her about this, she asks, "why does it have to be on?" and ignores my explanations. Is it possible to purchase a light switch that requires a pword or number combination to turn off the light?