Because we would be near the Equator where the days and nights are split almost evenly, I wanted to be sure I carried enough candle-power and backup batteries to get me through the nights. Here, my son, Paul, tests the lights. I wore both Petzl and Princeton-Tec headlamps, and carried a Sure Fire LED flashlight whenever the sun was down. The Sure Fire light was actually partly for self defense; we carried one Beretta 9mm pistol, and one .22 rifle among us. if you saw a big animal in the dark, the ultra-bright beam from the LED light would supposedly disorient the animal until help arrived. Fortunately, that never became an issue.