Sofirn C01R deep red [sold out, discontinued]

[djozz]

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.

[Barkuti]

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?

Highest bin available for the XP-G3 seems to be flux code 32 (Octopart XPGDPR-L1-0000-00F01 search), and flux code 30 for the XP-E2 (Octopart XPEBPR-L1-0000-00D01 search).

[Pwsmith]

Please sign me up for two.

[lightdecay]

@djozz

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.

Big, if true. Is that claim originating from a trusted and reliable source?

[Lux-Perpetua]

Djozz + Barkuti,

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. ;-)

[Ryzbor]

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.

[Lux-Perpetua]

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. ;-)

[der_horst1 (der_horst)]

interested!

[Geese]

Interested in 1 more for a total of 2.

Thanks!

[shirnask]

Up my interest to 2

[Barkuti]

For some reason took a look at Samsung 3535 leds section. They market an LH351H Deep Red (SPHRD1L3DH00A4R2D2 Octopart search) and an LH351H Deep Red V2 (SPHRD2L3DH20E7W410 Octopart search, no hits).

The LH351H may be worth testing against their Cree counterparts.

[Chronovore]

@Cosmodragoon

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.

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?

[djozz]

@Barkuti

For some reason took a look at Samsung 3535 leds section. They market an LH351H Deep Red (SPHRD1L3DH00A4R2D2 Octopart search) and an  LH351H Deep Red V2 (SPHRD2L3DH20E7W410 Octopart search, no hits).

The LH351H may be worth testing against their Cree counterparts.

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).

[mikelights]

VERY Interested in 2 of them

[zipelgas]

Interested

[Tally-ho]

Interested in two units, preferably wine red anodization with deep red LED (660 nm).

[Ilmatic]

Interested in 1

[Esociform]

Interested, please put me on the list for one.

[Barkuti]

Also looked at Luminus' horticulture stuff. Their SST-10-DR is available in both 90° and 130° beam angles. I'm no expert in optics and don't really know how would this impact the beam profile, but the tighter beam angle emitters may be desirable and the perceived brightness would be higher thanks to a more throwy beam collimation (related SST10-DR-B90 Octopart search). Some SST10-DR-B90-K660 parts in stock at Mouser (Octopart search link here).

Concerning the XP-G3 thing, will it fit under the C01S TIR? Because no way if it doesn't, I think.

[Slayer1]

2 for me