That's the theory and it sounded great in the adverts. But in my experience, "automatic" means on by default and most folks don't think about them, creating the problem- we're all blind because the damn things come on too much. To work properly, they'll have to know where the city limits are, not just trigger at "x" lumens level. And while we're temporarily blinded, "Fooly Automasted Slef Driving" will probably kill us before that happens...