LEP Flashlights are INSANELY Bright

Testing an LEP (laser excited phosphor) flashlight. Can it actually throw a beam 1km? Are these things even useful? Teardown, measurement and explanation of how these things work. The flashlight we tested is the Trustfire T30R, here is the amazon link: https://www.amazon.com/TrustFire-Flas... 00:00 Introduction 02:02 Background 04:35 Range Testing 08:40 Power Testing 16:35 Teardown 19:47 Summary 22:11 Closeout Long Time Coming by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/