Lumens figures are misleading. The 10K lumens is probably with the 5000K or 6500K emitters. According to SKV89’s test, the E12R with 219Bs only put out 4300 lumens.
Yeah I saw that and don’t believe it for a second, It’s my brightest 219B light so if he got that figure, there was an issue with his testing or his light, Vihn produces some weird ass test numbers sometimes too as do others. Luckily I have many lights to compare and I’m not worried about one test when I can just do a comparable eye test and see if it’s lacking compared to other high-powered lights. Fireflies also specs lights out with 40T’s so it’s not like they’re milking every last Lumen.
The Nov-mu claims 5500 Lumen yet it’s been tested at 7000+ at power-on. I have progressively higher and higher 219B lights and the E12R is as expected atop them all. If that’s how many Lumen the E12R makes, than every other manufacturer of my lights are straight liars.
Vihn just tested the Thor II at like roughly 400-500 meters less throw than what everyone else is getting, does that mean that’s what all Thor II’s actually throw? Obviously not. One thing we can count on, is everybody will be getting different numbers so it’s pretty irrelevant. I will look at and trust side-by-side comparisons as that’s where a light will pass people’s tests or not.
Edit: One more thing, D18 in 5000k-6500k is rated closer to 14,000 Lumen like the Astrolx MF01S and the Mateminco versión. (Except those are rated at 15,000 Lumen in the 5000k-6500k versions)
Let’s do some math to determine the most optimistic, best case scenario numbers.
I’ve heard the D4V2 pulls 18 amps with 4000k sst-20s from a high drain cell (30Q or VTC6). I can’t find a source but we’ll just use this for my estimates.
This means the LEDs are getting 4.5A each, and have a forward voltage of about 3.5V 
According to Lygte’s tests, a 30Q/VTC6 drops to about 3.7v somewhere at around 18A drain. This means a flashlight’s circuit including the springs, mosfet, and traces will optimistically drop about 0.2V at higher currents.
Since the D18 has one spring per cell but other parts of the circuit have resistance, I’ll say very optimistically that the D18’s voltage drop from the batteries to the LEDs at 60A is 0.3V. This is probably a very optimistic figure and the real value should be higher.
Right after start up at a 20A drain, a 30Q/VTC6 drops down to ~3.65v. (Right at start up, <0.1Ah drained).
3.65-0.3=3.3V
At 3.3V, the 4000K SST-20 consumes 3A and produces 720 lumens. 6 of them (6 per 18650 in the D18) consume 18 amps of power (should be close enough to the 20A assumption).
720X18= ~ 13 thousand LED lumens. This is before light is lost as it passes through the optics and the lens.
So conceivable, for about a second or two after start up the 4000K D18 might produce 10 000 lumens, but LEDs lose their output as their temperature increase so that output will plummet after just a few seconds.
This is a very optimistic figure, and done to the best of my knowledge. Now if someone has a clamp meter and would be willing to measure a D18 at turbo, we’ll have a more accurate figure.
This is the kinda breakdown I was hoping someone could give. I know even things like spring amp ratings have to be accounted for (Thanks Texas Ace’s WildTrail WT90 group buy thread). So I know there are real limitations and I was wondering how they broke down in a D18 with it’s internals and these emitters. So thank you for the “best of your ability” break-down kind sir.
So going with higher amp/lower capacity 18650’s could hold it technically a smidge longer? But at this level with this many emitters, it would likely take 4 cells to see any gains. Now I get why MF01S can do a bit more Lumen with the same amount of emitters as the D18.
Can we do a petition for a KR4 with adjustable variable tint like E21A 2000+5000k?
Or just buy one with 2000k and one with 5000k?
Difference in recent xpl-hi 5d to the "3-4 months ago" 5D. From left to right: 2 D4v2's with 5D from March-april. The dark gray dt8 is yesterday's 5D (ordered 3 weeks ago, received yesterday), and the right is the 2850k 8A.
It almost looks like Yesterdays 5D is 5000 K. I'm actually gonna double check the box when I get home.
EDIT: it is definitely 4000k, and it's awesome. It only looks cooler compared to these leds, when compared to xpl 5K the warmth is noticeable.
Ordered a d4v2 Ti with 219bt-v1 4500K. Hank also carries the 10621 optics now too on his new products page. Hopefully it’ll jive well or I’ll just order another one with the w2’s and use it for that!
Might be a silly question, but which version of Anduril 2 is used in the DT8? I can’t see a DT8 specific version?
No, I wanted have both colors in one light and adjust the color temperature at my choice
My D4SV2 with the SW35 is sitting in a distribution centre right near my place and it’s killing me. I’ve got a battery ready to go and I keen to see what these emitters will do in the D4Sv2 body!
With freshly charged 30Q 18650 cells, D18 219B vesion turbo current is 48A at turn on, that is 2.67A per LED,
which I think it’s still within safety line?
In that case, D18 219B version should be with direct drive, no current limit.
Sounds promising. :) Do you have some Samsung 25S or 20S to test with again? These are supposed to be the most powerful 18650 cells available. If D18 219B works with them properly, there should be no way of killing these LEDs. :D
How many 219B SW30 and SW45K do you have left?
Oh and by the way, Hank did you have any chance to take a look at my previous post?
https://budgetlightforum.com/t/-/57210/3207
What do you think? :)
Default original optic back in stock for D18. Also can now select Nichia 219BT-V1 3500K and 4500K emitters. Order placed.
Hoping for tint below BBL with nice light pink hue, Thanks to Hank Wang for all your efforts. You are the best!
Haven’t had a shipping notification for a DT8 with SST-20 5000k after 10 days. Is that normal?
I ordered on 13/7 and got shipping notification only on 23/7. I assume he must be very busy with the 219b orders. (and I contributed 2)
Hank is in overwork
Please be patient
Good to know. I’ll keep waiting patiently!
I love the DT8 in 219BT-V1 4500K emitters it’s so ‘dinky’ much better than the D4V2 which i never really took a liking to.
What would be estimate the maximum and highest sustained lumens are for the 219BT in the DT8?