- Welcome everyone!
> PM’s have gone out to everyone on the list!!!
> UPDATE,April,11,2022
Sofirn has confirmed with me the LT1M will be offered in the same Orange, Green & Black colors as the full size LT1 Lantern
> UPDATE,March,24,2022
Below is my initial tests of the Pro-production model along side of the IF25-based prototype: The Pre-production Sofirn BLF LT1M vs the LT1M Prototype!
> UPDATE,February,27,2022
Sofirn has fixed the issue from that link to the pre-sale of the untested prototype has been removed from that topic post. - They are sending the design team prototypes for testing & evaluation first so it can be made sure its ready for sale, then once its tested, any bugs are fixed, and all is good, then the production model will be released, we will work to get this testing done ASAP to get the production model ready for order.
> UPDATE,August,17,2021
Some news for everyone interested in this LT1-Mini project! The team is well underway with the design & development of the BLF/Sofirn LT1-Mini! While DBSAR has been going through a big move & life’s change, he is slowly getting re-settled in a new home, and getting back into work of things on these lantern projects. In this case, LT1 team member Lux-Perpetua have stepped in to really help push this project forward with a finalized design for the mini LT1 lantern. Barry of Sofirn is with us 100% on the team to get this into testing phase and production soon!
> UPDATE,Feb,12,2020
- Ok all, here is the video explaining how i refined a lantern head for the LT1 Mini and still use the original IF25 LED up-firing configuration, with the original quad-TIR optic still used. I will get the drawing of how it was done completed soon, explaining its principle and how the Mini V1 prototype works. Here i have modified the LT1 Mini with the same LH351 2700K and 5000K 3535 LEDs as used in the full size LT1 lantern. As planned for the production version, it will have the same LT1-Andruil operating firmware as the fullsize LT1, some body design changes, side switch changes, base cap changes to add a removable magnet, (the magnet will help hold a wider accessory base plate for more stability) and add a 18650 sleeve so it can be used with a single 21700 or 18650 cell.
- Members asked for a more compact, backpacking-sized version of the LT1, and we have listened, & will create that Mini-version, like the Mini-GT was created, the LT1 will have a baby variant with nearly the same features. 
- Here is the new separate build topic for the new planned Sofirn BLF LT1M (LT1-Mini)
Barry & Sofirn sent a couple candidate hosts that i examined & tested as a platform for the LT1M , (an IF25 and SP33) I disassembled both lights, worked with them to see which one would be the best foundation for a mini LT1, and the IF25 was the clear winner. As the IF 25 already has USB-C charging, 21700 support, compact design, AND already has tint ramping with four 3535 LEDs, it is the perfect starting point for the Mini.
So i re-worked the IF25 with the same Samsung LH351 2700K and 5000K LEDs as the LT1 full size, then i spent countless hours of testing every type of shade and globe design, and finally came up with one that works perfectly to create a 360 degree very smooth, even, low-glare light using the IF25’s existing up-firing LED design as used for the flashlight. The LT1-Mini will be much easiwer & simpler to work to get into production than the LT1 was, as the host IF25 already has some good starting points. (the charging, the 21700 format we want, tint ramping etc.
All we need to work on is to get Toykeeper’s LT1 Andruil programmed to this driver, (if the driver needs alterations to accept Andrul maybe Lexel can have a look at that) possibly change the switch LEDs to match and work the same as the full size LT1, and maybe some changes to the LT1M body to ad knurling to match the full size LT1. I will be posting design drawings and photos of how i got the new shade to work so well with an up-firing design soon, and create a video of what went behind the LT1M to get it what i have now as a V1-Mini prototype.
While the high-mode run times may be a bit less than the full size LT1, the plan is to still focus on great run times as much as we an from a 21700 single cell, with the same high CRI 2700K to 5000K tint ramping, Toykeeper’s amazing Andruil-LT1 firmware operating system, a high degree of light transmittance angles, low-glare, USB-C charging, all the best features of the full size LT1 but in a more compact, pocketable, backpacking friendly mini-version.
- Below, is the completed, & tested LT1M-V1 Prototype, along side the full size LT1, and second photo shows how smooth and even the light transmittance is, which is very close to that of the full size LT1. Maximum lumens are average of 350 to 400 lumens output, with that beautiful adjustable High-CRI tints of the sofirn BLF LT1. :+1:
We will begin an interest list as we did with the full size LT1 once we get the new office-set up for the build team, so stay tuned for updates, and a video soon of the birth of the LT1-Mini.
