strike a light - ignition
The moment of ignition. Some of the yellow/orange light below is probably the lighted match I used to ignite this one. You can see that there is some liquidizing of the chemical compound where it is burning - or that's how I see it anyway - perhaps solid to liquid to gas to burn. Hard to catch the ignition - I tried many times before I caught this one.
God said - let the sun generate precisely the right light and heat to promote and support life on earth, and there, with exact positioning of the earth in orbit, it was.
Somewhat later, man found a way to carry a sun like replica in his pocket.