Gas lights emit visible light and X-rays – both speak of nuclear ractions: we are doing Molecular Nuclear Fusion
So oxidising carbon fuels would take in heat. It is only the nuclear fusion whicxh makes the whole process exothermic.
We can double the heat, but having a Face Centred Cubic metal around – like Ti or Zn. So zinc platig boiler plates would halve our gas usage,
Covered in the literature
Satinder Ahuja, Neil Jespersen - 2006 - Science
and places the wire in the flame of a Bunsen burner the wire will heat and glow red. ... 9.3 X-RAY EMISSION X-ray emission is often called x-ray fluorescence
So a Geiger counter wil show any bunsen burner does nuclear fusion while working.