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?
When ramping I noticed that there are two blinks. One at about 300lm and the second at the top of the ramp. Iām guessing the first one is 1x 7135 and the second is 8x 7135. Is this correct?
Hi, I updated my review. I know, itās been a long timeā¦ (changes mentioned below)
Iāve done my own measurements and it is nowhere near your 2200lm on max ramping brightness.
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 wonāt believe it was measured at 30s. No way.
Vinh got 7% more output by decreasing the resistance in the circuit. Iām assuming that means just a spring bypassā¦probably. I would love to try it but Iām not really good with soldering and donāt want to permanently ruin the light.
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.
Iām fascinated by the FW21 Pro to the point Iāve nearly purchased it more than once, but Iāve 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 youāre 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 youāre looking at ~9.26A to hit 3333 lumens per emitter or 27.8A
illumn āhelpfullyā suggests NCR18650GA (10A peak discharge) and INR18650-35E (8A peak discharge) as compatible 18650s which probably arenāt 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 ā¦ 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 ā¦ 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?
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
I have an integrating sphere made with pvc tubes and a luxmeter
None of my lights reach the Claimed lumens and throw, but I measure the FW21 at 10600lm. Itās the only light Iāve tested that measures over the claimed lumens, that must be something
Guys, I did my best at measuring its output but my equipment is rather simple compared to some integrated spheres, but by far it was measuring accurately. My Wizard Nichia output was accurate, compared SKV89, the same thing with FW3A. But maybe it cant handle that high brightness wellā¦ I will try again, but Iām not gonna argue - you may be right, I may be wrong