seawater to fuel

Check it here

Now what's softpedaled in this is the amount of energy it takes to recover the hydrogen v the energy recovered. Which aint gonna make it practical, as we do things today. You were given a hint with the radiation lighting the fluorescent bulb. No way that flame is producing the same total output.

But there's one way to do this economically and that is to use nearby Nuclear power during 'off-peak' hours. For all intents, Nuke power used during less than capacity periods is free to its 'owners'.