Yes. Cigarette smoke is harmful to your health and using anything to light a cigarette is therefore dangerous.

I don’t think that’s what you were asking though. It can be dangerous to put high-output flashlights in bags without doing something to prevent them from turning on by accident. On most flashlights, loosening the tailcap a quarter turn will prevent it from turning on.

If you leave it to a 2 yo child, it may become dangerous 😀