There is a Mystery Busters team that is solving mysteries and catching criminals (like Scooby Gang from Scooby Doo). There is no magic in the setting, the solution is always mundane, a trick done with smoke and mirrors. The technology is present day tech. The budget is 1000$, you can use only what's accessible to civilians/ can be created by an amateur electrical engineer (so, yes to soldering iron, no to magical microchips and non-existing superconductors).
Anyway, the latest mystery the team is trying to solve is a certain cult leader, lets call him Mr Fraud. He claims he is a holy man, a living saint, God's confidante, with real powers that come from faith... and has fairly loyal and fanatical followers as a result.
The proof of Mr Fraud's grandiose claims? He can emulate a very specific and very ancient miracle. The Holy Fire miracle. Specifically, any candle you bring to him, he will light as if with by magic. He would say a prayer, shield the candle with his hand as if lighting a cigarette, say "Thy will be done!", blow on it and the candle will be lit after that.
Now, the rules:
No preparing the candles beforehand. For example, dipping the wick in potassium and mineral oil mixture so it will start burning once the oil dries out and potassium self-immolates is forbidden. Everybody can bring him a candle of their own and he should be able to light it.
It must not be dangerous for Mr Fraud. So the danger of self immolation or chemical burns or poisoning or electrocution should be kept at absolute minimum.
While he is wearing a priestly robe with pockets, if this is to be accomplished by chemical means, the chemicals must not be kept inside those pockets. It will be mighty suspicious if Mr Fraud dips his hands into his pockets every time before he does "The miracle". A chemical that can stay on one of his fingers that when mixed with the other one on the other finger induces fire is ok.3a) No smells (like oil or gasoline) or odd colors that can be seen from two meters away. So the chemical must not be radioactive green or garish purple or anything like that.
No false fingers and electronic pull igniters like the one in this video. The trick must be done quickly and publicly. He should be able to light 10 candles in 10 minutes, without "Is that a bird? A plane? Superman?" misdirection between. False rings or small electronics hidden inside his sleeves are fine.
Bonus points if he is able to do it without an external assistance (a guy with invisible UV or high voltage IR laser for example)
Bonus points if Mr Fraud can do it outside or in the rain.
I had the idea of using UV laser inside his "church" with the beam that lights up only on specific place and only when Mr Fraud "presses the button" on his ring. That would be one way to do it but very dangerous, one look at the wrong place and his vision is gone.
Is it even possible with today's technology? Is it possible to make it portable?