Earlier quoted context omitted.
I can usually forgive some tech contradiction details, but its really annoying when there is faster than light travel... But to create contrived suspense because no technology exists to make a flashlight strong enough to illuminate a cave for 10m ??!?!
The humble flashlight must be one of the most abused pieces of modern technology in fiction. According to video games, it doesn't matter what century you're in, it is impossible to create a flashlight that lasts for more than a few minutes, and only provides a feeble cone of barely-light for that time. According to science fiction, despite the fact ~98%+ of the people reading this literally have a flashlight in their…
A tangent: it dawned on me only a few years ago just how little power LED lights use compared to most other things we do with energy. I never had a good intuition for this, so I was surprised when I noticed that keeping my smartphone's flashlight active at full power doesn't noticeably drain its battery - in stark contrast to even keeping the screen on (and thus the phone's CPU awake).