What happens when a 32,000-lumen flashlight gets concentrated through a magnifying glass or a fresnel lens? Some cool optics, but not a lot of burning.
Later, The Action Lab does show that the flashlight can certainly heat up black construction paper quite nicely by itself.
This is a follow-up on his shining of the flashlight on an untrablack object coated in black 2.0:
• What Happens If You Magnify the Worlds Brightest Flashlight? (YouTube / The Action Lab)