Magnifying The World's Brightest Flashlight (200,000 Lumens)
A video on YouTube. In Science & Engineering, a Krater category.
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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.
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