EDIT 12-4: Looks like E07X is in stock today. Hmmm⌠Wonder if I was right or was just seeing things.
Fireflyâs 15% fire sale is still going, but unfortunately it looks like the light Iâm talking about here, E07X, has now sold out. The LED with the rosy tint FFL351A 4000k unfortunately seems gone for the moment, at least in this host. So glad I pulled the trigger quickly on this premium light!
There are other lights that are extremely interesting that I am ordering, such as the newly release E04 Surge with FFL505A 3500k Rosy and the 30% off X1 Elite with FFL707 5000k. Both with upper-medium throw of roughly 500 m.
If there is one thing I absolutely could not stand, itâs the yucky green color in the beam (I have Zircon 1/4 and 1/8 on my Sofirn lights with SST20 and LH351D), so I stay away from some Luminus and XHP LEDâs they are offering. But this is strictly personal preference and those LEDs are available if thatâs what youâre interested in.
The Firefly E07X is my first flashlight with the Lume1 driver, a 6A High Efficiency Constant-Current Buck Driver (over 90% efficiency) with FET Turbos. I know little outside of internet search, which indicates this is a premium and highly desirable driver which should result in excellent sustained output, and runtimes. Anyone with more knowledge and expertise on this driver pls feel free to chime in. The Lume1 driver is designed by the interesting sounding Loneoceans Laboratories, owned by a fellow who was an EECS student at MIT (Gao Guangyan's Loneoceans Laboratories!), and who @loneoceans has posted here on BLF.
In this hobby, I am mostly interested in the LED, its CRI, how it renders colors, and whether it is devoid of yucky green tint . For my use case of a 1 hour evening walk, sustained output and efficiency are of course on the list, but not at the top. Still itâs nice to see the well regarded Lume1 driver is used, because itâs yet another indication of an extremely well designed light, where everywhere I look, there are premium components and thorough attention to details.
Just like to share this interesting picture: the last 2 lights I ordered, Convoy M21H w/ 219b 4500k and M21E w/ GT-FC40 came with purple reflection lenses.
Especially puzzling in case of M21E because my old first-gen M21E w/ exactly same GT-FC40 LED from a couple years ago had green reflection lens. Itâs kinda annoying, but lesson learned: for every light I ordered from Convoy now, I will ask for the green lens ahead of time.
This is only for tint snobs who care about dropping Duv btw. Donât worry about it if thatâs not what youâre looking for.
Not sure the 3 and 8 degrees will work with your 4x219b since they both have a big protrusion in the middle. Maybe 219b domes are not tall enough to cause interference.
GREAT heads-up for everyone interested in these TIRs thank you. In case of 219b x 4 the fit was ok since the pointy tip is in the middle in between the 4 LEDs arrangement (posting picture so others could see what Iâm talking about).
But youâre absolutely right - especially that 8 degree the protrusion comes within a couple mm of opening. I think any single LED with dome would be a problem? (Iâll take a picture of these TIRâs later on so people could see.)
I tried with XHP70.2, doesnât fit. The protrusion pushes against the huge dome. From something with smaller dome, might be fine? But itâs definitely designed for flat emitters.
My set of 6 TIR lenses:
3 , 8, 12, 24, 36, and stripe 10x30 (Simonâs âstripâ is typo).
The stripe lens is also referred to as striped, linear ripple, or by the shape of the beam, elliptical. Stripe refers to the many horizontal grooves etched on to the surface. The 10x30 from what I could google search likely refers to beam angle, 10 is vertical, 30 horizontal. Someone says it could refer to the sides of the rectangle surrounding the elliptical beam but Iâm not sure about this. I believe this lens is used for bicycle light so it doesnât shine onto eyes of driver in vehicles going opposite way. I have no use for it but got it out of curiosity. @QReciprocity42 or anyone pls correct any info above as needed.
As mentioned in post by @FunkyRider86 above, the TIR lenses have internal protrusion that points towards the LED. The protrusion comes up to different depth, the higher the beam angle, the less the protrusion. So the narrow beam angle lenses do not fit with XHP70.2 in M21H for example. FWIW the elliptical lensâs protrusion also comes very close to surface.
Whatever LED you want to try these with, (obviously) check with Simon first.
Very interesting! The exact angle measurements are nonsense (as they depend also on the emitter used), but the relative throwiness/floodiness should still hold. 10x30 most likely refers to major/minor axes of the elliptical beam, there is no rectangle surrounding it. Stripe should produce the most elongated beam, with the direction of elongation perpendicular to the direction of the stripes.
TIR lenses are always hit or miss for a particular emitter. I found that to achieve perfect focus using the 3 / 8 degrees lenses on XHP70.3 HI, you have to use the 7070 10mm gasket on the emitter. This pushes the TIR optic about 0.8mm away from the MCPCB, instead of resting directly on it.
I did this mod on my M21F, using 3 degree TIR and 7070 gasket, it made the beam a lot tighter.
The beam shot with gasket, it made the central hotspot tighter and more pronounced, with slight donut hole, which means the focus is good like in a smooth reflector.
Great point thank you. I now notice Carclo for example doesnât give angular specs in their 1062x series.
Is it correct to say 10/30 is the (linear) ratio of minor over major axis? And similar to angular specs, this may not hold depending on the emitter use? That poster who wrote itâs the sides of the rectangle around the ellipse was actually correct?
I think the aspect ratio is a reasonable interpretation. I have a suspicion that larger emitters may make the ellipse slightly less pronounced (i.e., closer to a circle), but probably not by too much.
I donât quite understand where the mentioned poster is getting a rectangle from, I donât see any rectangles around the beam. Technically there are no well-defined ellipses either, but if one looks at the beam on a white wall and draws curves along which intensity is constant (i.e., making a contour plot of intensity), these curves should look more or less elliptical and have more or less the same aspect ratio.
Picture of the front. Sorry for the garish red of the plastic folder I grabbed.
I tested all these lenses with my M21H with Nichia 219b x 4. The 4 LEDs âconvenientlyâ leave a hole in the middle so the fit appears to be Ok. For my 219bx4 light, the problem is not with physical fit, but the nastiness of the beam, only with the 3 degree TIR, so far as I could tell with preliminary testing.
Beamshot of the Convoy M21H with Stripe 10x30 TIR, resulting in elliptical beam shape. As mentioned this lens has a protrusion in the middle, hence may not fit if the LED has a dome.
Summary/opinions of Firefly X07A before I move on to M21H TIR lens. IMHO.
Firefly X07A w/ FFL351A 4000k Rosy Tint:
On arrival the Firefly X07A instantly became my most beautiful and well thought out light. Everywhere I look, there are premium components and thorough attention to details. Lume-1 6A CC Buck driver, magnetic USB cover, captive clip, button with perfect feel and travel, beautiful & functional knurling and cooling fins, are all features I consider best among all the lights I have. The FFL351A 4000k LED has the distinction of being the LED that not only survives an A:B shootout against 219b 4500k, but also manages to make 219b 4500k a little whitish/sterile in comparison (it is not âbetter,â just different). With Duv around -0.0090, FFL351A has a pleasantly warm color rendition, but not yellowish warm, more like very beautiful pink-rosy warm. This LED makes red color pop like nothing else Iâve ever seen. Rocking a short-lived 4300 lm turbo burst, the tiny light amazingly lit up the whole side of a small hill in my neighborhood. The throw is low-medium, further than S21D (around 170 meter), but not as far as GT-FC40 in M21E (300 m) for example. Outside of cost, a jewel of a light, recommended without reservation. IMHO a must-have for hobbyists interested in LEDs with beautiful color rendition.
Someone PMâed me and asked about FFL351A 4000k Rosy Tint vs 519a DD. I have the Emisar D4K w/ 519a 5700k DD & boost driver (same light as the one on Toykeeperâs Favorite Lights list), which I havenât opened since itâs a gift. But just from a quick peek, a brief observation: 519a DD is also VERY pleasant (I much prefer it to non-DD 519a), it also makes 219b 4500k a little whitish sterile in comparison. FFL351A takes the rosiness to the next level (it makes red color pops like nothing else Iâve seen). To answer another question: 519a 5700k DD looks very different from FFL351A because of the FFLâs rosiness. Neither 519a DD nor FFL351A replaces 219b 4500k as my reference, which IMHO has the truest daylight color rendition (do green and red etc. look like how they appear during the day).
The one light/LED that looks the same as FFL351A is S21F 2700k + 5700k 519a tint/CCT-mixed in Turbo mode. But at much lower output. In a previous conversation w/ @QReciprocity42 , I mentioned in a hobby when you get to a certain level, âthingsâ are different, not better. And thatâs the case here. âCollectorsâ (in the best sense of the word) would probably want to have both.
The thing about Firefly E07X is itâs not just the LED, the host itself is excellent and one of a kind for hobbyist lights, at very reasonable cost. Iâm used to Convoy and Emisar and of course still love and buy both brands, but Firefly is next level IMHO.
. For my use case of a 1 hour evening walk, sustained output and efficiency are of course on the list, but not at the top. Still itâs nice to see the well regarded Lume1 driver is used, because itâs yet another indication of an extremely well designed light, 
