Magnifying The World's Brightest Flashlight (200,000 Lumens)

Summary by Krater

The host tests the Imalent MS32 flashlight, claiming 200,000 lumens, and demonstrates its destructive burning power on various materials. He then discusses the conservation of etendue to explain why a flashlight cannot be focused to a point hotter than its source.

From the video

Answers: What happens when you use a 200,000 lumen flashlight to burn things and can you focus light to make it hotter than the source?

• Imalent MS32 flashlight
• 200,000 lumen flashlight testing
• burning objects with high-powered flashlights
• conservation of etendue in optics
• temperature limits of focused light

What it concludes

• The Imalent MS32 outputs 200,000 lumens and doubles the LED count of the previous 100,000 lumen MS18 model.
• According to the conservation of etendue, it is impossible to squish light down smaller than the source of that light unless you lose some of it.
• You can never magnify any source of light to make something hotter than the source of light itself.
• The highest temperature you can get from a flashlight is achieved by putting the target right on top of the flashlight, not by magnifying it with a lens.