Hello @ dayleeo, good futuristic hunt.
While you are alive you have some light on yourself.
When is the small difference in temperature Lumen produces light, when there is a big difference in temperature - the surplus is stored in the condenser!
The power of light is like a cell phone, what which is quite enough.
With ( Tritium ) add-on device lights up in the dark so you can always find it.
Simply, this is your eternal light ( always at hand ) and you are the source of energy for it.
Super idea.

Good luck with hunt.