Convoy S21D w/ legendary Nichia 219b :) - Impression & comparison w/ Nichia 519a & E21a (in D4V2) & other LED's.

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xevious
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cannga wrote:

Buy before stock runs out Smile https://www.aliexpress.com/item/3256803395084090.html?spm=a2g0o.productl...

Can you PM me the page with the discount code? Thanks!
snfx
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scs wrote:

Looking forward to your tests with the other TIR optics, cannga. I just ordered the light and the optics pack and will be sorely disappointed if the optics don’t perform well.

S21D one of the best lights IMO

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cannga wrote:
snfx wrote:
shirnask wrote:
snfx wrote:
cannga wrote:
All very pretty. I really like the Emisar host, but LOVE the Reylight Pineapple Copper (check out the aged copper finish).

I have two Convoy H2 headlamps: Nichia 219b 3500k and 219b 4500k. Long story short: beautiful beam, USB-C charging, just buy it. In my wildest dream I could not have fantasized lol 219b sw45k in a headlamp. I have many other headlamps (Fenix, Sofirn, Coast, etc.) and these two Convoys have far and away the most pleasant/attractive beam and of course the highest possible 9080 CRI.

Buy before stock runs out Smile https://www.aliexpress.com/item/3256803395084090.html?spm=a2g0o.productl...

I’m very tempted to buy the H2 but I shouldnt lol

That was the last straw for me – I bought 2 Facepalm

LOL, I love it!!

I would’ve jumped on these if I didn’t just pick up another Zebra T_T

Guys just think which other vendor would be dedicated enough to the hobby to put Nichia 219b in a headlamp? It’s nuts, unprecedented, and unlikely to be repeated.

The warm beam color just flat out KILLS my other top headlamps: Sofirn D25L, $$$ Fenix HM65R-T, Coast XPH30R. BTW like nearly all Convoy lamps they run hot and hence remain top-class with respect to prolonged brightness. And at 20 bucks with the present coupon, how could we lose? Innocent

I know they’re different lights but would you go with the S21D or the H2 Big Smile

Could I also get the discount code for it down to $20? I only see a discount for orders over $26.78, you get $1.34 off. You could get a US $7.14 discount for Orders over US $142.85 Sad

cannga
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jon_slider][quote=cannga wrote:
I agree also with your observation that frosted optics are less bright than clear optics also true for wide angle optics, they are less bright on target, than narrow angle optics

IOW there is a price to pay, a give and take whichever direction you take. Like nearly all of my hobbies, or life Sick ?

Also adding the following based on my (limited) experience – what do you think?
TIR optic tends to “beautify” the beam, picture perfect clean hotspot and spill. If you don’t like beam artifacts stay with TIR, and for perfection goes one step further, FROSTED TIR , but brightness may suffer.
Reflector doesn’t hide artifacts such as extra rings besides the classic hotspot and spill. My Reylight Pineapple Copper, presently the only vendor brave enough to use smooth reflector with 219b 4500K, has so many rings on white wall hunting I stopped counting. Not the fault of the light, just the way it is with reflector.

Sorry guys *!@#^ Aliexpress tricked me again with the “tricky” discount code advertisement ; it’s for $140 purchase. So no discount, but doesn’t Simon post discount code on his BLF thread? (I’ve not used one.)
S21D vs H2: S21D quad LED with TIR will have much brighter beam and less artifact than H2, which has single LED with Reflector albeit Orange Peel. OTOH if you need a headlamp…. of course it’s the one and only H2 Thumbs Up .

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cannga wrote:
IOW there is a price to pay, a give and take whichever direction you take. Like nearly all of my hobbies, or life Sick ?

Also adding the following based on my (limited) experience – what do you think?
TIR optic tends to “beautify” the beam, picture perfect clean hotspot and spill.

Yup, everything has limits, want a more diffused beam, willing to use less Lux? etc

I personally tend to avoid fuzzy beams, diffusion, frosting, etc.. If there are artifacts, I live with them or move on.. but I generally dont add filters, films, or diffusion. Otoh, I really like Pebbled Tir.. (consistently inconsistent, I am.. lol)

as far as reylight, the one I worked on had a perfect beam. I actually use it as an example of what good looks like:
look at the first two images in this album: https://imgur.com/a/SHULq4S
(those are all single LED, I dont use quads, and seldom use triples)

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For owners of Emisar D4V2 wondering about the difference between D4V2 and S21D, I have a more concrete answer with arrival of the Oppel Lightmaster.

First, wrt quality of beam, from picture below I see beautiful beams from D4V2 with quad 219b LED and 10622 clear TIR. When you are near perfection like D4V2, there is nothing the S21D could improve upon IMHO.

Where the S21D is better, is prolonged brightness. In real life use, I have noticed that the D4V2 starts bright but then becomes too dim to use for me as a walk light. Photographs also show a dimmer, smaller beam versus S21D. With the Lightmaster Pro, I now could roughly quantify the stepdowns of D4V2 vs S21D 219b 4500K using ceiling bounce method. The number is percentage of lumens of max Turbo start. The 2 lights start at roughly same brightness level, but watch the difference in subsequent stepdowns.
D4V2: 100% start, 40% at 2 minutes, 28% at 5 minutes, 22% at 10 minutes
S21D : 100% start, 85% at 2 minutes, 68% at 5 minutes, 39 % at 10 minutes
Roughly, 90 seconds after Turbo start, Convoy’s lumen values are twice those of D4V2’s.

BTW, prolonged brightness seems to be the hallmark of all Convoy flashlights I have, big or small. They do all run hotter than other lights (60° C at the head is par for the course), and they do seem to stay bright. Conversely, very rapid/significant stepdowns seems to be the behavior of my small Nichia lights with Anduril, Wurkkos TS21 and D4V2. PS Still love all my Emisar’s, for many reasons Thumbs Up Smile .

cannga
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Btw the D4V2 has max stepdown temp set to 55 C.

When I have time maybe I will rerun the test with max temp set to 60 to equalize the equation.

Also maybe rerun at one level below Turbo (lower starting brightness) to see if that helps the light to not stepdown to such a low level.

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Those results are no surprise. Convoy’s rather basic heat management usually results in relatively high and stable sustained brightness.

cannga
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I first got into this hobby with headlamps, and remember Sofirn D25L with fondness as it was first time that I saw actual description of the LED used, Samsung LH351D, on Amazon. Hence the realization that I needed to investigate. (That was about 20 flashlights ago. Facepalm )

The hobby obviously took a left turn from max brightness to max beautiful beam. I’ve read hundreds of reviews, bought a few excellent lights, but this headlamp hobby seems to be at the end of the road now with Convoy H2 and the ultimate LED lol, Nichia 219b 4500K. Only Convoy would be brave and nutty enough to do something like this, and the result is – how could it get any better?

WRT brightness, as with all the Convoy lights I have, prolonged brightness is the hallmark. It makes Convoys lights the very best for walk light for me.

I over-exposed the shot to show the faint ring outside of the traditional hotspot and spill of Convoy H2 4500K. Don’t think of it as a flaw, think of it as bonus extra spill Silly . Kidding aside, yes visible on OCD white wall hunting, but invisible in real life use (it’s too faint and outside field of vision). HIGHEST recommendation.

cannga
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Reading from Opple Light Master Pro.

Nichia 219b 4500K
CCT 4775
Ra 95.2
x 0.3486, y 0.3287
Duv -0.0135

cannga
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For me 219b 3500K always threatens to take the crown from 4500K big brother.
The 4500K is brighter subjectively and makes colors pop, but 3500K has a very warm, more comfortable beam color.

I don’t know why 219b 3500K is not talked about as much, but I love it both in Convoy H2 and Emisar D4V2. If you’re new to Nichia, after 219b 4500K, this might be the next LED I recommend, over 519a 4500K.

Please note my close-up beamshots as in the post above always “intensify” colors (increased saturation). In real life use, once the light beam is spread out over a much larger area, it looks a lot less intense/saturated. So you just have to imagine that the beam color of 291b 3500K becomes more of a nice warm golden tone, with rosy tint, especially if you compare it against the some greenish LED’s like LH351D and SST20/40.

Nichia 219b 3500K
CCT 3484
Ra 95.5
x 0.4001, y 0.3732
Duv -0.0067 Thumbs Up

scs
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cannga, do you have any lights with 519A 3500K? If so, how do you like that compard to the 219b 3500K?

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I have a 219b sw30 (3000k) installed in a Thrunite TH20. Gorgeous tint, but the headlamp underdrives the LED… where max setting is rather weak. But, it makes a great close-quarters task light.

Anyway, I’m in frustration-ville right now, because I can’t for the life of me find my TH20 or D25L… must be tucked away somewhere when my mind was focused on something else. Very tempted to go for a Convoy H2, but not in a big hurry. I am going to keep an eye out for the next discount round, maybe in the fall?

cannga
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scs wrote:

cannga, do you have any lights with 519A 3500K? If so, how do you like that compard to the 219b 3500K?

Sorry I do not have 519a 3500K, only 4500K.

Based solely on my experience with 219b, 519a, E21a all at 4500K, I have this feeling (repeat: feeling, meaning speculation/YMMV Smile ) that whatever secret sauce or phosphor formula that was in the 219b, that results in that unique color and tint, may not be seen again in subsequent LED’s. 219b 4500K from so many years ago and no longer made remains the “gold standard” for many (not all, but many) hobbyists wrt beam color/tint.

For me, E21a was close, but has a more obvious yellow tint shift. 519a has an entirely different tint/more yellow beam color with higher Duv, etc. IMvHO, if you are trying to decide between 519a 3500K and 219b 3500K, my vote would be 219b because IMHO it’s the “best” until proven otherwise or particular personal preference dictates. 219b 3500K also has the very best possible rating R9080 in case you don’t already know. It’s a beautiful LED that I think any Nichia hobbyist would appreciate.

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Has anyone tested the XPL HD version of the S21D yet? I’m interested to know max and sustained lumens.

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cannga wrote:
For me 219b 3500K always threatens to take the crown from 4500K big brother.
The 4500K is brighter subjectively and makes colors pop, but 3500K has a very warm, more comfortable beam color.

I don’t know why 219b 3500K not talked about as much, but I love it both in Convoy H2 and Emisar D4V2. If you’re new to Nichia, after 219b 4500K, this might be the next LED I recommend, over 519a 4500K.

Agreed 100%. Many of my frequently used lights got the 219b sw35 treatment, especially my small keychain light. Much easier on the eyes in the dark. Others are getting the 519a 3500k now, including a SC31 Pro and my FM18500/P60 jobby. That 519a combined with convoys 12-mode omnivore driver has really brought that FM back to my favorites list. Nothing like a somewhat mini 6P that has almost as much capacity as an 18650 light while still being able to run AA/NiMH/L91 if the occasion requires.

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Wow, great thread.  Does anyone have a beamshot comparison between the S21D 8a vs . S21D 12a with the same emitters?

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Thanks John – hope it’s been helpful. Btw I have the following TIR optics for S21D and though no picture yet, just want to touch on this topic for those buying the lights. The optics are listed in order of decreasing central/hotspot brightness, and increasing “floodiness”:

1. Sofirn Clear 10 Degree (from IF25a)
2. Convoy Clear 10 Degree
3. Convoy Beaded 10 Degree
4. Convoy Beaded 30 Degree
5. Convoy Beaded 60 Degree

Sofirn spec is not known, but I’m labeling it around 10 Degree because the beamshots are very close to the two Convoy 10 Degree optics. The two 10 Clear optics are my most favorite because I crave brightness in my Nichia lights. The Sofirn 10 Clear appears a little brighter on photographs, but measures very close to Convoy 10 Clear. I don’t see the point yet of the 10 Bead optic but pls give me some time to think about it lol .

Please note a 10 Degree optic helps with more hotspot brightness but it’s not turning S21D into a thrower by any stretch of imagination. If you want a thrower with beautiful Nichia beam color? Have to go for Convoy GT-FC40 4500K light.

If you like a more floody beam then I would go for 30 Bead. This optic has probably the best balance between flood and throw character of the 5 optics.

If you are an OCD white-wall hunter Thumbs Up and want to see the most beautiful beam devoid of artifacts, if diffused and dimmer in comparison, then 60 Bead. (Though you may not notice this “beauty” advantage in real life use.) Overall, my two top choices would be either 10 Clear for throw or 30 Bead for flood. All IMHO as always.

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Beam shots of the 5 optics; hope what I discussed above makes more sense now. Comparing optics with photography is somewhat tedious but necessary. Such an objective test is the only way because I don’t trust my visual memory. The only visual memory I trust is instantaneous A:B comparison, which is not possible when comparing different optics with only 1 light.

Between the two floody optics, I prefer 30 Bead over 60 Bead because 30 Bead’s gain in central brightness outweighs the 60 Bead’s gain in peripheral brightness (not large enough). But of course YMMV.

Btw the picture below is one of my most favorite flashlight shots because although it took some effort, it so clearly illustrates the progression from 10 Clear to 60 Bead. Lastly, Convoy optics are available as a 4 pack https://www.aliexpress.com/item/3256804406224003.html.
And the Sofirn IF25a optics is here https://www.sofirnlight.com/products/quad-optic-lens-for-if25a . Both extremely inexpensive and and fun to try.

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cannga wrote:
Beam shots of the 5 optics; hope what I discussed above makes more sense now. Comparing optics with photography is somewhat tedious but necessary. Such an objective test is the only way because I don’t trust my visual memory. The only visual memory I trust is instantaneous A:B comparison, which is not possible when comparing different optics with only 1 light.

Between the two floody optics, I prefer 30 Bead over 60 Bead because 30 Bead’s gain in central brightness outweighs the 60 Bead’s gain in peripheral brightness (not large enough). But of course YMMV.

Btw the picture below is one of my most favorite flashlight shots because although it took some effort, it so clearly illustrates the progression from 10 Clear to 60 Bead. Lastly, Convoy optics are available as a 4 pack https://www.aliexpress.com/item/3256804406224003.html.
And the Sofirn IF25a optics is here https://www.sofirnlight.com/products/quad-optic-lens-for-if25a . Both extremely inexpensive and and fun to try.

!https://i.imgur.com/TzGYfwd.jpg!

Excellent thank you. FWIW, the 10 degree has plenty spread. The 60 degree would be closer to a light bulb.

Thanks again.

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Thanks very much for your effort on comparing optics, Cannga. I’ve got IF25 and I’m on the fence of buying S21D 219B. How is the throw of 219B compared to SST20 under the same lens?

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Blggg wrote:
Thanks very much for your effort on comparing optics, Cannga. I’ve got IF25 and I’m on the fence of buying S21D 219B. How is the throw of 219B compared to SST20 under the same lens?

Very welcome guys. Once I loved Sofirn IF25a so much I bought two. Among my small lights, IF25a if a little “industrial” looking is otherwise similar to Emisar D4V2: best form, best “solidness,” best fit in hand, best button. Then I went into Nichia and CRI/R9 madness, and haven’t used the Sofirn much since Facepalm .

When it comes to brightness and throw the Sofirn IF25a with SST20 4000K wins. When it comes to beam color/tint/beauty, then it’s all over, Nichia by TKO in first round. SST20 4000K looks very green in comparison and once seen, cannot be unseen. I would very highly recommend you give S21D 219b 4500K a try, and maybe ask Simon for a gift: 10 Clear and 30 Bead pair with the light (pls don’t tell him I said this – grin). IMHO getting a 219b 4500K light is THE “next step” Smile for anyone new to this hobby.

Throw numbers – I just freshly learned how to do just yesterday, your question gave away my secret lol. Thank goodness my numbers seem to come very close to those of more experienced reviewers. I will post throws for all 5 optics for Convoy S21D later. Note that in real life use, good visibility for me is about 1/3 to 1/4 of throw numbers, meaning neither of these lights is what I would call a “thrower.”
IF25a w/ Luminus SST20 4000K LED: 246m
Convoy S21D w/ Nichia 219b 4500K LED: using same Sofirn optic 170m

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Thanks for the throw numbers. I didn’t expect that you’d have them in numbers, so that’s even a plus for me.

After seeing Simon having 10 Clear lenses for sales, I was kind of thinking that it was the same lens as IF25 as appearance-wise they look very identical, but as you’ve tested, they’re not.

Think I will go for 10 Clear and 30 Bead pair.

Not sure if you’ve already written somewhere, but if you were to choose just one emitter, which would you choose between 219b 4500k and 519a 4500k?

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Blggg wrote:
Thanks for the throw numbers. I didn’t expect that you’d have them in numbers, so that’s even a plus for me. After seeing Simon having 10 Clear lenses for sales, I was kind of thinking that it was the same lens as IF25 as appearance-wise they look very identical, but as you’ve tested, they’re not… Not sure if you’ve already written somewhere, but if you were to choose just one emitter, which would you choose between 219b 4500k and 519a 4500k?

Just to clarify (if you already know then never mind/ignore this): First, the Convoy 10 Degree Clear optic is actually very similar to the Sofirn 10 Degree Clear optic. And second, the Sofirn flashlight has better throw mainly because of the LED (Luminus SST20), NOT the optic or the lens. In other words for this comparison a. the optics are the same and b. the lens is only very slightly different (AR vs non AR), therefore the cause of the difference is the LED —->Luminus SST20 has better brightness and throw than Nichia 219b. But yes, bottom line is 10 Clear + 30 Bead optic pair is a good start for S21D.

My order of choice would be:
1. 219b 4500K
2. 219b 3500K
3. 519a 4500K

Head to head comparison 519a is colder (higher CCT) and more greenish (more positive Duv), whereas 219b 3500K is warmer (lower CCT) and more rosy/reddish (more negative Duv). My order is that way NOT because one LED is “better” than the other, just that the 219b 3500K has a unique and beautiful beam color with its warmth, saturated look, and rosiness. Simply put I just like it almost Smile better than all other lights I have. Until proven other wise (because of personal preference or whatever), I personally would explore all CCT’s of 219b first before I venture to other Nichia’s. Very subjective and IMHO (emphasized the O); you can’t go wrong with either.

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Thanks a lot.

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If you follow this thread from beginning, you would see my own progression from newbie, to Olight’s green hell, Nichia, then finally these very interesting measurements and comparisons with the great Opple Light Master Pro. I’ve learned a lot thanks to BLF.

Followed are throw measurements of the Convoy optics. For anyone new to this like me, throw measurement essentially reflects how bright the hotspot/central brightness is and more or less “ignores” the flood component of your beam. You put a light sensor some distance away, in my case 6 meters, place the flashlight so the center hotspot lines up exactly with the sensor, then measure the brightness 30 seconds after a “Turbo” start. Lights with higher central brightness win.

The progression from high throw numbers to low throw numbers means central hotspot brightness decreases obviously, but… peripheral brightness increases. That’s the trade-off (there’s a price to pay for every thing in flashlights Smile ).

1. Sofirn Clear 10 Degree 170 m
2. Convoy Clear 10 Degree 170 m
3. Convoy Beaded 10 Degree 157 m
4. Convoy Beaded 30 Degree 144 m
5. Convoy Beaded 60 Degree 113 m

The Sofirn 10 Clear is a touch brighter than Convoy 10 Clear photographically (I could eyeball brightness with my RAW software – will post pics later) but the two measure identically, confirmed with multiple attempts.

I have no picture to post, but followed is a shot of my most favorite place to visit, Italy’s Cinque Terre – @Argo.

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cannga wrote:
If you follow this thread from beginning, you would see my own progression from newbie, to Olight’s green hell, Nichia, then finally these very interesting measurements and comparisons with the great Opple Light Master Pro. I’ve learned a lot thanks to BLF.
Considering the timing, you ramped up extremely quickly. But then, you also benefit from a major mother lode of info & choices today (when I started it was a painfully anemic playing field and back then there was zero luxury on being tint picky). Some newbie people on BLF went crazy and bought up like every light they could find that had any appeal, but you seem to have been more methodical on your progression. I’ve actually learned a good bit from your explorations because you document them well. Thanks!

If you had it to do all over again, which two lights would you pick up first this time around?

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xevious wrote:
If you had it to do all over again, which two lights would you pick up first this time around?

I love this kind of question because it forces me to think about what is most useful and what is most fun in this hobby for me. Two lights is not enough and life is short so I really need to have 4. And were I to start new today they would be (all small lights that would fit in jacket pocket):

1. Convoy S21D with Nichia 219b 4500K. For me, the gold standard for objective CRI & R9 accuracy and subjective color rendition that all other LED’s should be compared to.
2. Convoy M21E or M21F with Getian GT-FC40. The only thrower on the market with Nichia-like color quality, but perhaps more useful than Nichia because of much better brightness and throw (324 m per my measurement). This is the all around every day light, the perfect gift light because it does so many things so well. Getian GT-FC40 has fantastic high CRI beam color that no doubt imitates Nichia 219b 4500K in real life viewing (magenta/pink). My own M21E sporting Duv of -0.0064, closer to the legendary Nichia than any other throwy LED in existence. The M21F is very pretty particularly in the blue grey finish, whereas M21E has a little more throw but less flood and a little more cumbersome. Either is a big winner with no competition as a walk light. Thumbs Up .
3. Wurkkos TS30S with SBT90.2. For me (flashlight) life is not complete Smile without a 4000 lumen super thrower, just to experience what it means. And I stopped looking once I have this monster. The Wurkkos rocks my Opple meter, clocking in at 993 meters throw (holy macaroni lol), barely missing 4 digits. What is so special about this light is the beam is “BALANCED: many super throwers have an extremely bright hotspot but little to no spill, resulting in a very narrow field of vision, the Wurkkos OTOH strikes a perfect balance between hotspot (throw) and spill (flood) click HERE. This is the prototype search & rescue and safety light that illuminates FIELDS, not areas. Nothing on the market comes close, not at 60 bucks.
4. Convoy S21D with Nichia 519a 4500k or 219b 3500K. Tough choices between these two. The longer I play with flashlights, the more I prefer a warmer tone, and I don’t think I’m alone. Our flashlight adventure is NOT complete without a low CCT light. Although there are many 3500K LED’s, I would like Nichia 219b version because for me it is the mother of all warm tone lol. It seems like the secret sauce that is Nichia 219b series has not been seen again, not in the Nichia’s I have, 219c, 519a, or E21a. Nichia 3500K beam is golden with gorgeous rosy/red tint. 219b 3500k has a “saturated” warm tone that I often prefer over the legendary 219b 4500k. 4500k has a colder, more sterile look by comparison.
519a is recommended because of how different its beam color is from 219b, and yet it still has spectacular CRI specs ( Ra 93.6, R9 82, R12 80, Duv 0.0009). While 219b has incredible and un-matched color rendering, sometimes the magenta tone of 219b might be too much for me :-), and 519a’s beautiful and relaxing golden tone provides a relief. I love having both because for me it’s like having different wines or food from different restaurants, all good yet different. I guess it’s called having fun with a hobby Innocent .

Replace Convoy S21D with the beatiful Emisar D4V2 if you want a smaller form with 18650 battery that fits better inside hand, and has beautiful styling and knurling. S21D does maintain brightness longer.
Replace Convoy M21E with M21F if you want something that’s more conveniently smaller and fits better in pant pocket (vs jacket pocket). M21F throw is less @ 276 meters, but in return it has better flood/spill.
All subjective and IMHO. Hope this helps.

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Joined: 11/06/2015 - 14:46
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Thanks for the beamshots and sharing your journey, cannga. I should be getting my S21D before the end of the week. I think I'm as passionate about driver efficiency and sustainable lumens as you are about the 219b 3500k and 4500k. I refuse to even consider lights with linear or FET drivers anymore, which is saving me a lot of money on the bright side. As much as I appreciate the existence of Sofirn, Wurkkos, Convoy, and Noctigon/Emisar, I also feel like they've contributed substantially to the proliferation and longevity of linear and FET drivers for 3v emitters, at the cost of switching drivers becoming the norm and standard for 3v emitters, outside of the big brands.

xevious
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Joined: 02/27/2013 - 21:55
Posts: 3177
Location: Hoboken, NJ USA

^ Thanks for sharing that cannga.

I agree, there is something special about the Nichia 219b. I have a few from 5000k down to 3000k. I do appreciate warm white, with about 3500k to 4000k to be my “sweet spot.” I do have one R9050 sw30k and it’s so much like incandescent. One day when I get around to finally reflowing LEDs, I’ve got a few of those in waiting to be installed in a triple.

I’ve been looking for a modest form factor single cell long thrower. Right now I have an old Nitecore EC4GT that has decent throw for its size (475 meters). I love the form factor, 2×18650 in parallel creating a rectangular body. I’ve been looking for something that can throw at least as far while also delivering a broader hotspot. My Sofirn SP33v3 falls about 200 meters behind the EC4GT but has excellent spill… despite the tint being cooler than I like. Anyway, I wanted to try something newer. First, I considered getting something on the inexpensive side, like the IF22A. But then I saw what Convoy was doing and that drew me to nearly buying an M21E. Then I thought maybe I should give Emisar a go. But after seeing the TS30S specs with SBT90.2… the price is very attractive. I just wish it came in 5000k.

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