Can’t wait to properly test it out at my friend’s house who lives out in the country. I also have the Sofirn BLF SP36 with 4x Samsung High CRI LEDs, and love it.
After 20 days of waiting, my Sofirn SF47 (4 x SST40) has arrived. I will try and get a mini-review out sometime this week.
Some notes:
It advertises 9000 lumens on turbo but I suspect that number is inflated. Unfortunately I can’t test this; can anyone weigh in on the theoretical output of two 21700 batteries in series married to 4 SST40 emitters? This uses a constant current driver.
This light has some decent heat-sinking and a very comfortably sized handle to hold onto. It seems like a good design for leaving a light on high output and not having to feel or stress about the heat.
I’m kinda curious what this light would be like with 4 SFT40 emitters.
Says they tested with 2x 5000mAh 21700 so that’s 37Wh
Also says Turbo is 1.5h runtime so on average it would be using 25W.
Nothing is doing 9000 lumens for 25W so they are not mentioning that Turbo means X seconds or minutes at XXXX lumens then the power is cut down a LOT but they keep counting the runtime on low power as “Turbo”.
4x SST40 can do 9000 lumens if the batteries can do over 12A in series for 90-100W which would suck the batteries dry in 20 minutes while burning your hand so instead it will do that for a short period then as the torch gets hot (won’t take long) it will cut the power down.
So for a short time, yes, it should do 9000 lumens.
Well step-down is no surprise; I’m familiar with the BS that is ANSI standards. I was just curious whether this could even hit that max output figure. Sounds like it should theoretically be able to. Thanks for the answer!
EDIT: Oh, hold up. The batteries are rewrapped Lishens (LR2170SD) so they are rated at 9.6 amps. I guess the light may under-perform with these cells. It may be two 21700s and a spring bypass away from greatenes
I was making fun of this today . But after having carried it it the woods and along the bike trail , I find it an oddly ,satisfyingly , legal club which is very comforting out in the dark places . It’s also a pretty decent light . I retract my ridicule.
Is it the ML300L? I see a there is a flashlight enthusiast review over here. That is a LONG runtime test. Neat that it can maintain 100% output for about 18hrs even if the max output isn’t crazy high. Definitely a light for someone worried about sustainable output rather than maximum output or ergonomics.
Yes the ML300L. it doesn’t drop down , but I think they rate it at just under 700 lumens . Aside from the ugly dark spider web lookin dark spot in the beam , which is easy enough to get rid of , it’s got a very practical and usable beam to it . It’s also an awesome club !
I wouldn’t be surprised if even LEDs with negative DUV turn much positive when measured at so low currents like moon and firefly mode,we lack often this info.