The MAXSA 40331 Dusk to Dawn Flood Light automatically turns on when it is dark outside. The energy saving feature turns the light off after 12 hours at full power or 6 hours at half power. This light produces 240 lumens at full power and 120 lumens at half power. It’s great for driveways, walkways, a front or backyard, barns, sheds, or anywhere else where you don’t have electricity but could use more light. Includes rechargeable Lithium Ion battery pack.