As we prepared for our project in the Congo we had to take a long hard look at what types of lighting we could bring. There were many variables we had to look at while trying to reduce weight. This included both light size & output, and battery required to power the unit. We ended up with a nice mix of 2 small panels, and a custom made flex light. All our lights were powered off Sony NPF style batteries which allowed us to only bring one type of charger along with batteries that could work on any unit.