Dark skies are the holy grail of an amateur astronomer, If you think about light pollution that degrades the night sky, that's a huge waste of energy. Why should Winnetka pay to light up my house.? The problem is primarily Winnetka's outside lighting fixtures that shine up and sideways as well as down. The solution? Install reflective shields that shine the light down where it is needed; as a green environmental bonus, this effectively cuts the energy needed in half. So save money.
In short the world we live in is becoming ever brighter to the point where some areas you can no longer look up and see anything other than the brightest of stars. What can we do you ask? Simple. Turn off your outdoor lights or if they are needed use proper shielding to prevent light pollution. Make an astronomer happy, Turn the lights off Please.