SBT90 / L90 Driver advice

Flashlight Modding and DIY Parts
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Hi all, its been some years since i’ve post here, I thought id got this out of my system but recently snagged a LEP and that seems to have awoken something

So anyway years ago i recall a user on here managing to fit a Generation 1 SBT90 (round die) led into a Jaxman Z1 it had a wonderful perfectly round circle beam…

I see now that many of these older Leds are just a few bucks now… I am wondering if anyone’s got any driver suggestions? ideally looking for a buck 2-3cell

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Have also just spotted the L70 HI are those any good?

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There’s the Convoy L7 driver 2S buck pretty high amps

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any info / links?

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These are not first-gen SBT90’s, but imitations that perform worse than the 2nd gen. For a good round throwy emitter to throw in a Z1, the SFT25R is hard to beat.

5

so these are fakes?

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The Kaidomain round die emitters are imitations, yes, not the original SBT90’s. They still have ok performance though, but if you want maximum throw in a round die, SFT25R is currently pretty much the best emitter for this purpose.

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thanks buddy, i just ordered a 5k one but i cant find the driver info is it 3v?

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Both the L90 (imitation SBT90) and SFT25R are 3V. The SFT25R does well with 8A of current or below, the L90 can take a lot more (but in exchange heats up very quickly and goes through a battery in very little time).

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SFT25R Arrived today so I promptly swapped out the YINDING 5050 with its glass removed that I’d installed previous in the Jax I only have a 7amp driver but the beam is definitely cleaner way more uniform tint and nice amount of output, thanks for your great advice definitely a nice little emitter!

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10

So glad to hear that the mod turned out well! 7A is a good drive current for SFT25R, maintaining efficiency and thermal performance; going above is pushing its limits.