Save battery power!
Looking at that video, I'm sure the plane would stay up longer if it didn't have such powerful headlight.
The famous Pentagon tech wildcards at DARPA have announced plans to move forward with a flying, full-size prototype "Vulture" strato-wingship able to cruise the upper atmosphere for 5 years without landing. The Vulture programme got underway last year with three competing industry teams carrying out development work on …