Convoy S21D w/ legendary Nichia 219b. Review & comparison w/ Nichia 519a, B35AM, FFL351A Rosy & "tint-snob" LEDs. (Summary & measurements on P. 1) LATEST: Firefly E07X with VERY rosy 351A LED and Lume1 Driver.👍

LED Flashlights – General Info 21700 Flashlights
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Interesting to see how a frosted TIR optic smooths out the beam.
Upper is Emisar E21a 4500k with clear optic, lower is same Emisar with frosted optic.
(The 219b light has clear optic in both pics.)