Yes, the LED is on a standard MCPCB and is independent of the driver board.
I dont see any inconvenience here. Simply pressing the tailcap down on a grippy surface(like a sheet of shelf paper or silicone) seens like it would do it. Heck, maybe even just your palm.
Do you have an output graph to show the regulation of high mode?
Sure, here you are.
Régulation looks perfect, thank you!
Nice.
Pretty nice regulation actually. Nice! The kickstarter looks to be reaching the stretch goal for the Samsung LED as well — backed.
Yes, everyone can choose the LEDs they want!!! 
Thank you so much for your support!
Strange graph… Why not to switch to lower level when voltage drops?
I never used Kickstarter. How I select LH351D? Does the price include European VAT?
Nichia 519A :innocent:
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Strange graph… Why not to switch to lower level when voltage drops?
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Actually it does. You can find the Turbo, it was originally 1100 lumens, and then gradually reduced to 300 lumens.
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I never used Kickstarter. How I select LH351D? Does the price include European VAT?
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Just back the item on Kickstarter at first, and then we will send you an email to collect your address information and the LED option after the project ends.
All the shipping fee depends on your address.