Continuity mistake: When Victoria is about to abseil into the cave she is abseiling right handed (i.e using her right hand behind her to brake). In the next shot when she leaps and begins abseiling, she abseils left handed. There is no time between shots for her to move the rope to her other side and change hands. (00:14:45)
Continuity mistake: In the opening scene just before Victoria descends into the cave, she's wearing two headlights, the bigger one is on her right side and the smaller one is on her left side. In the next scene while she is talking to Josh, the position of those two headlights changed. (00:15:10)
Chosen answer: Being someone who uses the PETZL Duo headtorch (the light used in this movie) I can say that yes, the LED option lasts MUCH longer than the standard bulb.
Braddles