[Review]Lumintop FW21 Pro - 10000lm destruction

LED Flashlights – General Info 21700 Flashlights
22

It is probably not coated. And I love this smell! Sad that you dont…

I will do those measurements between 30T and LG M50T and update you with the results. In my opinion it is not worth to put a higher drain cell in it, cause you have pure turbo only for a moment, only with full charged battery.

23

I have a 40T but I’m thinking if it’s worth it to get a 30T. I’m guessing it’ll only be about 5% difference but that’s just a guess. On the skylumen website 40T is recommended for best performance.

24

If “Best performance” means “400lm more on fully charged battery on turbo @1s which is impossible to notice anyway” then I’m sure it is true. :wink:
But I’m gonna use my M50T because of 5000mAh, instead of 3000mAh

25

Thanks for the review, I bought one. I need to order battery as well: Samsung INR21700-30T 3000mAh - 35A or 40T 4000mAh, the price is almost the same at nkon. The latter is the better choice, right?

26

That depends on whether you want more run time or more peak amp draw performance.

27

I’d choose more runtime, you won’t even notice max brightness difference

28

is it safe to use a 10A 5000mah battery in this light?

29

When ramping I noticed that there are two blinks. One at about 300lm and the second at the top of the ramp. I’m guessing the first one is 1x 7135 and the second is 8x 7135. Is this correct?

30

It is safe :slight_smile:

And second blink is 8x7135, the first one… probably 1x7135

31

Hi, I have tested it with a fan for cooling the flaslight as if it was on a bike, and here is the graph.

! !:FW21-pro-ceil133-40-T-cooled-350410487911055 hosted at ImgBB — ImgBB

32

Hi, I updated my review. I know, it’s been a long time… (changes mentioned below)

I’ve done my own measurements and it is nowhere near your 2200lm on max ramping brightness. :frowning:

In fact, my results are:

1417lm high mode (max ramping)
7596lm turbo mode, but only @1s, and brightness decreased quickly, so at 10s it is about 6800lm. Really hard to tell, because at 9s it could be 7100lm and at 11s 6700lm.
With 4.1V battery turbo gives only 7200lm, so my 7596lm was with 4.2V battery on a first try. And I used Samsung 30T cell.

EDIT: I saw ZeroAir review, he got ~ 9500lm at 30s which is ridiculous. He probably used higher drain cell to get this result, but I won’t believe it was measured at 30s. No way.

33

I measured mine at near 1500lm max ramp (and fully sustainable after calibrating temperature)
and 10600lm in turbo at 1s

Using a Molicell P42A cell

34

Vinh got 7% more output by decreasing the resistance in the circuit. I’m assuming that means just a spring bypass…probably. I would love to try it but I’m not really good with soldering and don’t want to permanently ruin the light.

35

Does anyone know how many amps this light draws in high and turbo modes?

36

In high it is (according to TK) most probably 2.8A, on Turbo it could be 15A, idk

37

Thank you, that helps me with my battery choices. 15A at 10,000 lumens seems low. the 40t should do it but I will try the 30t and Molicel as well to see if there is a difference. :+1:

38

Great review, thank you

39

You can share the results here if you want :wink:

40

I’m fascinated by the FW21 Pro to the point I’ve nearly purchased it more than once, but I’ve got my doubts that it will hit the claimed 10k lumens on turbo:

  • Assuming 3V XHP50.2, maximum rated current is 6A which just cracks 180% nominal lumens with top-binned emitters hitting 1328 lumens at 25C or a still-optimistic 1200 lumens at 85C so at max current you’re looking at 2160 lumens; Some hazy - and probably far too generous with diminishing returns and all that - math dividing 2160 by 6A suggests 360 lm/A thus you’re looking at ~9.26A to hit 3333 lumens per emitter or 27.8A
  • illumn ‘helpfully’ suggests NCR18650GA (10A peak discharge) and INR18650-35E (8A peak discharge) as compatible 18650s which probably aren’t going to do much for turbo, although they do recommend the INR21700-30T in 21700 which will push 35A

However, the review indicates that output is closer to 7000 lumens so the current situation changes:

  • 2333 lumens - 2160 lumens at 6A = 173 lumens / 360 lumens per amp = 480mA deficit so peak current demand is 6.48A x3 = 19.44A … a much more comfortable overdrive level
  • 20A is within the realms of more humble cells such as the Samsung 25R which I have many of

Thus … is this a real bump from the D4 / D4S / FW3A in terms of output - either at turbo or at a brightness level the light can actually sustain?

41

My Bangggood orders take about 30 days to reach me so I will not have my FW21 Pro till the 20th of this month. I do not have the equipment to test the light but would like to know the Actual numbers it will produce. Hoping someone here with the equipment who owns one will test it. I purchased it after watching a few videos on You Tube up against the NSX3A which I own. The FW21 looked a bit brighter then the NSX3A but with slightly less throw. It did surprisingly well against the Acebeam X10 and the Fenix Lr35R as far as output goes. Fenix LR35R - Nightwatch NSX3 NS53A - Lumintop FW21 Pro - Acebeam X10 comparison - YouTube