Obligatory "Um, actually 🤓"

Edison didn't invent the light bulb, he just made it practical. Additionally, there's no actual fire inside light bulbs. Fire is a chemical reaction that consumes oxygen + fuel and turns it into carbondioxide + some waste product like ash or charcoal. The reason light bulbs last longer than oil lanterns is because no fuel is being burnt.

To put it very simply. When certain things get heated up enough or have electricity put through them, they glow. A light bulb is literally just a substance like that inside a vacuum chamber with electricity running through it sometimes. The whole point of the vacuum is to prevent fire while also keeping the heat from spreading to other parts of the light bulb. Additionally, air inside the light bulb would expand when heated, causing it to explode, so the vacuum is also to prevent the glass from exploding due to pressure.