Sorry on constantly picking on details, just I would like to warn about E21A 2200K, which is tested by maukka to be the worst E21A tint (all other E21A tint is around 90-95 CRI, even the 6500K one, 2200K is under 90 CRI, and with poor R9 rating). If any warm white E21A projects will be realized, keep it with the 2000K or 2700K, because they have the best result at maukka.
Also, it is again dreaming, but if any time ever, an E21A BLF LT-1 will be realized, a 'moody' variant would be highly appreciated (having 2000K on the warmest end, and 3500K on the coolest end of the tint ramp - 3500K is also a very good tint, which Clemence also loves).
I’m still waiting for the low-high version of the C01S in other types of anodization. I hope that in any version, the mode order will be low-high.
That said, I would ABSOLUTELY LOVE some other warm options. In fact, I’m pretty much always in the market for new flashlights meeting the following criteria:
- Warm and pretty tint
- High CRI
- Runs well on Eneloops (AA or AAA)
- No PWM
- Starts Low
No strobe or overly complicated UI
If Sofirn wants to release a version of the C01S meeting those criteria at 2000K, I’d buy a few. Really, anything meeting those criteria is going to have me trying to buy a few. I actually tried to buy over a dozen of the original C01 but some of them were lost in shipping.
For 660nm I would certainly go for the new 660nm XP-G3 because it has an perceived output (lumen) that is very close to the 625nm XP-E2 which is a big achievement because that implies that the radiometric output is 4 times higher at the same current. I never tested the 660nm XP-E2 but I expect it to be disappointingly dim compared to the XP-G3.
djozz you are saying you didn't test any photo red XP-E2. As I said in #86 the radiant flux differences between XP-G3 and XP-E2 aren't big, at least according to datasheets. Highest radiant flux codes listed are 33 (525mW @ 25°C) for XP-G3 and 30 (450mW @ 25°C) for XP-E2.
I also posted this XP-E photo red test by koef3 @ TLF in #91, notice how the die surface of such emitter has nothing to do with regular XP-Es (much bigger).
Hey! What about making a small whip round to gather a few €uros for djozz to test photo red XP-G3 and XP-E2 emitters?
I just asked Sofirn to try testing BOTH tints as soon as they come to make a prototype. They will now think about the idea buying some XP-E2 deep red and XP-G3 deep red but nothing is for sure right now. They told me they have very few influence on the exact flux bin, though. Until now I guess they have XP-E2 red on stock, only.
I also asked for a C01S with SST-20 2.700K 95CRI but they got another idea, trying out LH351D 2.700K 90CRI that is being used in the LT1 also. Maybe they can also try using different host materials like brass, copper or even titanium. But this should be discussed in the general Sofirn development thread to not derail this interest check. ;-)
2200K E21A has a R9 value of 53 and CRI 91 while the 2000K E21A has R9:89 and CRI:96.
Therefore I don’t see why one would chose the 2200K over the 2000K.
Wine red looks gorgeous. Light red anodisation looks cheapish.
Sofirn told me they have difficulties to get Nichia LEDs but Luminus SST-20 is far easier. Anyway, this topic will (hopefully) soon be conducted in another interest check. ;-)
That’s pretty much what I look for in flashlights too.
Sorry to hear that some of your lights were lost in shipping. The C01 is an amazing little flashlight. It’s bright enough for small tasks, makes an excellent reading light, and lasts a wonderfully long time. If they made more of those in that deliciously warm tint, I’d buy ten!
That said, put me down for at least one of the red ones here. Do we know if they will be low-high?
I have test numbers in my scratchbook for 625nm XP-E2, 630nm 219B, 660nm XP-G3 and 617nm Osram KR CSLNM1.23-8K8L-24 . Will enter them in Excel at some point and make a nice post. The Samsung led may be for a next test run.
My general impression is that the performance of red leds from the different leading manufacturers are not that far apart, but that the far red XP-G3 is ahead (but has a bigger die).
