The BL600 Series of Battery Powered Deck Marker Lights are an inexpensive and simple solution to landscape lighting and deck lighting. Since these lights are battery-powered, there is no wiring required at all for installation. The lights use 3 AA batteries (not included in the package) and have a battery life of up to one year. The light also uses LED (light-emitting diodes) will last a lifetime and never have to be replaced