Installing a dusk to dawn sensor on your outside lighting is a great way to save some money. Keeping lights on all day is just a waste of electricity, wish is an increasingly costly commodity. Dusk to dawn sensors use a photocell to detect when there is light outside still and turns the light on only when it begins to get dark. There are also similar options now for indoor outlet style night
. lights, which automatically turn on when your room gets dark. For more information on dusk to dawn sensors, check out the following link: http://www.watthackers.com/wp/installing-dusk-to-dawn-photocell-in-exterior-lighting-to-save-power/.