42

I don’t think the 3 less CRI are visible to the naked eye :smiley:

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43

I just received a P01 with 3700k and I absolutely love the tint on this LED! it looks less yellowish than my 4500k 519A lights.

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44

Are you able to make Opple measurement or something like this? These should be the newer batch of less rosy FFL351A.

45

unfortunately i dont have any device to take such measurements. I will try to take some comparison beamshots with a 4500k 519A with WB locked on a white wall

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47

Because I’m in the mood for teardowns right now: The shot of the FFL351A 3700 K 95 CRI.



The LED chips of FFL351A and FFL350RD are not identical. They differ in various respects, including the arrangement of the individual points:



The substrate also looks different for both LEDs; different manufacturers are therefore likely. Again it is very difficult to remove the phosphor layer from the FFL351A, it is very stiff and crumbles away if pressure is applied to.

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48

Interesting, considering the same footprint + similar (real) LES size I would have expected them to source the same chips for both. Curious.

49

The actual size of these chips differs slightly, but not much. Around 4 mm² seems to be some sort of de facto-standard LES size.

But these LEDs are clearly different in some aspects. Weird, indeed.

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50

Ordering an emisar d3aa and I’ve been told pretty much the ff emitters are the way forward over the nichia 519 which I’m both used to and like. Although I just need a little nudge to confirm I’m making the right choice. Will the ffl351rd 3700k 96 cri be a good emitter choice for close to medium range edc type uses, note in this edc I would like an emphasise on throw with a not so much flood, my nichia 519a equipped D4K isn’t great for outdoors when you can only get those lumens 50ft in front of you.

51

A D3AA is going to be pretty floody with almost any emitter config, simply how a triple optic works. If you want more throw, you should look into a single-emitter light.

Under maximum current for all emitters, the FFL350RD throws a bit more than dedomed 519A or FFL351A, but likely not very noticeable unless you do a side-to-side test. The high Vf and masked square LES make it significantly less efficient than the 351A/519A. However, if you plan to use med/low modes most of the time, the 350RD can crank out significantly more throw at the same drive power, just because of a smaller die.

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52

Ah even with a spot narrow optic you would recommend a single emitter reflector over triple for throw, maybe I can live it I have bigger lights I carry when I know I need distance. Maybe I should just stick with the 519 and have it dedomed, can’t remember if I read the beam isn’t as clean in optics with dedome, also is it reduced output?

53

519a Dedomed in my D3AA with stock optic has a very clean beam.

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It is more floody than my TS10. I have not tried the Spot optic, but they are easy enough to install if you want to test it.

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54

That one’s a perfect example just send it lol

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55

A “spot narrow optic” is quite the misnomer. It is the spottiest among all optics in the Carclo 105** series, but objectively is still very floody.

A dedomed 519A would be a pretty good solution. The 10511 might play slightly nicer with the dedomed 519As, or you could get some weakly frosted tape for diffusion (which is what I do). The number of lumens is reduced compared to pre-dedome, but that is really a faulty comparison because lower CCTs have fewer lumens to start with. For example, a dedomed 519A 5000K is around 3600K, and thus should be compared to a 519A 3500K for output. The reduced die size upon dedoming may also increase the optical efficiency of the TIR. In short, lumens loss should not be a worry for dedomed 519A.

56

Just for information/clarity: the optic in your light is the 10511, which produces a very, very different beam compared to the 10507, which I assume is what “spot optic” refers to. The 10507 plays better with domed emitters, while the 10511 is better for dedomed; there are fewer artifacts.

57

Will the ffl351a 2700k be tested? =)

58

Is not planned so far… in terms of optical and electrical properties the 2700 K variant would be the same as for the one tested here.

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