Flashlight optics and reflectors.

Cyparagon said:

It can't be done. Your limitation here is emitter size, and those 100W LED are actually an array of 10x10 1W dies. The effective emitting area is enormous compared to a single die. You can add a gargantuan focusing optic (parabolic mirror or convex lens) to bring the divergence down, but that means a very large initial beam diameter. Therefore, you will NEVER get a beam like the one in your video. Physics says it's not possible. Not with that LED.

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