Before you go to bed, do you switch on your outdoor lights ?If the answer is "yes", you may want to rethink your lighting strategy. Excess light is causing light pollution, a serious problem compromising our view of the universe, interfering with astronomical observations, as well as wasting billions of dollars a year, among other adverse effects.:blushing: Take this quiz and find out. 1. Do you light only what needs lighting? Or do you have outside lights all over your yard that go on automatically every night? Tonight, take a look outside and ask yourself “do I really need all of those lights on out there?” You may find out that you are a culprit. 2. Do your outside lights stay on all night? If you’ve decided that the lights are necessary, is it necessary to have them on from dusk to dawn? 3. Do you think the “more light the better?” Think again. Average 60 watt lighting is probably all that you need to find your way to your front door. You are not performing brain surgery or anything that requires bright intense lighting. The idea that “more is better” doesn’t apply to lighting. 4. Do you own or know what cutoff light fixtures are? Full cutoff fixtures shine the light down rather than up. This avoids excess light shinning into the sky, where it’s not usually needed. Cutoff lights also help keep the lights on your property, rather than shinning into your neighbor’s yard. Do you really take care about all this issues?