Thanks. I’ve apparently missed that this driver was a linear driver. Revisiting the product page and the PDF i can clearly see it now. Even the name suggested that
I guess I will have to find a boost driver.
Boost is not good too,you'll need buck-boost since LED voltage can be lower than full battery (4.2V). Other option is to use two cells in series (18350/CR123) + linear or buck driver.
They are indeed!
The ones I like the most are the 4000K Luxeon and the 3000K Luxeon V2. Actually I am thinking about getting a triple of 3000K of these
It is a very pleasant beam and tint! I guess Luxeons will be, after all, my favourite Leds
Osram CSLPM1.TG (aka white flat 2) is now available in higher 6P flux bin, that should be about 10% brightness increase compared to 5P (according to datasheet and previous measurements - about 1800lm @ 7.5Amp):
16mm DTP boards are out of stock, new batch of gen2 boards are expected by the end of March ( about 1.5 month later than planned because of virus thing).
Luxeon V 4000K is in stock again, CAT code is V13F (same Vf bin as 5700K so they can be mixed), mixing 4000K+5700K is added as option for all 4x and 6x boards:
Due to current situation, those boards will not be available for some time, 16mm 3030 DTP are back in stock, next are 3030,3535,4040 20mm Cu DTPs and 3535,4040 16mm Cu DTPs.
Depends on interest, but it's an expensive LED, additional problem is custom DTP PCBs have to be made and those have large min. order quantity, so I'm not sure it's feasible.