Magnifying The World's Brightest Flashlight (200,000 Lumens)
To remove your personal information from the web, visit https://joindeleteme.com/ACTIONLAB20 and use the code ACTIONLAB20 for 20% off. For international plans, please visit https://international.joindeleteme.com Flashlight I used: https://amzn.to/3Lj2fM3 Good summaries of Etendue: https://www.mikewoodconsulting.com/ar... https://what-if.xkcd.com/145/
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