A couple of $15 tiny headlamps for us. We don't hike at night..or wander around much after dark.

Luci, as noted, is a great solution for a tent light.. but we usually save the weight and leave it home an backpacking trips.
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963