The headlamp has four modes, center light, outer lights, all three lights, and flashing. The center light by itself is extremely bright. Turning the outside lights on in addition to the center light is hardly any brighter but does widen the output of light quite a bit. Throughout my testing I was surprised at how comfortable the band is considering the weight of the two batteries and aluminum light housings.
Overall this is a great headlamp that is extremely bright, has plenty of adjustment, is comfortable, and includes multiple ways to charge it.
If you are interested in purchasing this headlamp it can be found here.