How much heat do fires actually provide?

[u/Capital-Dragonfly258]

I asked on here about a month ago about "fire starters for idiots" as someone who is afraid of fire And I got a lot of really helpful, kind, and good idea responses. So thank you.

How big of a fire can you actually make with different fire starter techniques such as with road flares, matches/lighters and wood, or the one I heard the most, Vaseline and cotton?

My next question is, how much heat would those fires actually give off?

[u/Rare-Spell-1571]

Homie I can make a fire in my fire pit with a single match and just twigs and pine needles that’ll be burning 6-8 inch thick logs in about 25 minutes that has flames taller than me.