3.5 volts is the no-load voltage, not the operating voltage.
Normally, the no-load voltage is 0.4 to 0.5 volts higher than the operating voltage.
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If the optic footprint is compatible with Carclo optics then we can source separate optics if we want a different beam profile. Maybe you could sell some diffusion film in your store which can be put between the optic and the glass to soften and widen the beam, so that selling one optic is enough.
Will you make a 18650 triple?
Thanks for the update, 15 degree isnt bad, its a nice narrow beam
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@Simon_Mao I placed several orders for a bunch of TIRs. They arrived without any label so it’s almost impossible to sort them out (10° vs 20° etc). Going forward can you make sure there is a label on the bag like ⌀ 20mm 3535 30°
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One of the best also! Like the size vs brightness and sustained output.
I see that the L6 is now available with SFT70.
Does it use a 5A or 8A driver?
Would it throw as far as an L21B CULPM1.TG? Or anywhere close to an L7 SBT90.2?
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Sorry, I don’t know when you placed the order before.
But at present, every bag is basically labeled on the outside.
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6V 8A
it’s orange peel reflector inside, Otherwise, there is a black hole in the center of the spot.
it’s not as throwy as L21B CULPM1.TG or L7 SBT90.2
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I dont plan to make a 18650 triple, this needs new driver ,new adapter.
I hate to be that person, and I don’t want it to be rushed and spoiled, but do you have an update on this headlamp?
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Trying to add body sensing.
When the hand is close to the headlamp, it will change the mode or turn off.
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I personally prefer button controls but thank you for the update! 
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Ok that’s really cool! I hope it works out
It’s funny. I’ve been waiting for a convoy (or other) headlamp that is as low-tech as I can get with the regular convoys. Just a right-angle s21g or t3.
The only time I’ve been inconvenienced by a failed light in the wilderness, it was an e-switch headlamp that failed with some sort of driver short that ate – zero volt – several backup cells before I realized what was happening.
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Same here, I also prefer low tech. I also have a half-failed headlamp that had body-sensing.
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It sounds like a high tech thing that could attract some buyers. My problem is that to make it work well and be very robust and long lived, it would likely be too expensive to implement.
The other thing is that I have a problem with most “smart” devices. It seems that their intellect just doesn’t match mine. SO I am always fighting with them … until I fully disable all of their features.
Not sure how you would design this so that it would not be “accidently” turning on/off/dimming at the wrong time.
Good luck with the project.
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I’m in the same boat. Give me moonlight, low, medium, high, with a mechanical switch and no mode memory, and I’ll be set. Doesn’t take a lot to make me happy.
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A bunch of other flashlight companies managed. My guess is, it will use some radar doppler sensor, similar to what some higher end motion detector lights and some modern notebooks use to detect human presence - those can usually be tuned pretty precisely to a specific distance.
Moonlight is the only “modern” feature that is absolutely critical on a headlamp.
I’m convinced everyone buying headlamps without extremely-low modes camps alone.
There’s a really narrow range of outputs that is bright enough to be useful and dim enough that you don’t ruin other peoples’ night vision. The old way was just “put your hand over your light when interacting with other people in camp”, but we have the technology to overcome that now.
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These two modes of control exist simultaneously.
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