Flashlight concept #2 - the ideal Luminus SBT-90 Gen. II light

[Barkuti]

@Lux-Perpetua

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• What driver would suit best for this LED? Provided we used a battery tube of 3x 21700 batteries, would a 3s buckdriver (12V) be more useful for a good contstant regulation at less than maximum power or should we better go for FET with 3 cells in parallel and push the SBT90 Gen. II to its very limits?

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You can have both efficient and powerful buck driver. Check this thread from Lexel: Lexels driver compilation. He is developing a 40A CFT-90 buck driver for BLF GT, he has a starting point so.