The Energizer vision LED headlamp has a simple 2-output design that satisfies most illumination needs. The hands-free flashlight is equipped with 2 white LEDs that put out a maximum brightness level of 100 lumens. To operate the light simple slide the switch. There are no fancy buttons or push patterns you have to remember. The Energizer vision is a no-fuss easy-to-use headlamp with a bright output and an extremely long runtime.