I wrote down the argumentation because there is a common belief that deeper red is better no matter what (some people even want 720nm what we almost do not see at all), while in fact there is a strong trade-off in visibility. Any good reason to precisely want 660nm over 625nm despite the lower visibilty is ok to me though. 
Two please.
The deep red (660 nm) light would be far more useful to me. So if Sofirn produces these, then then I would like two more (for a total of 4). If only the 625 nm orange-red light is produced, then I will purchase only two. Thanks!
Lux-Perpetua, thanks for project-managing this for us! You are the man!
I would not be surprised if the 645nm and 660nm emitters you saw were actually the same wavelength, reported two different ways.
Some manufacturers or retailers list the peak wavelength, which is where the maximum output occurs on an optical power basis.
Others list the dominant wavelength, which is where the maximum flux occur on a luminus basis - it is adjusted based on perceived brightness according to the luminosity function.
It appears a peak wavelength of 660nm from a monochromatic LED works out to a dominant wavelength of about 645nm.
On the other hand, I am skeptical I could tell a 660nm peak LED from a 645nm peak LED.
Oddly enough, Creeās XP-E2 datasheet lists dominant wavelength for the red, but peak wavelength for the photo red. So the two are slightly closer in practical terms than the stated wavelengths indicate - the red has a stated dominant wavelength of 625nm, but from the spectral graph, the peak appears to be about 635nm.
The XP-G3 datasheet, in contrast, lists both peak and dominant together for the photo red.
How did I miss this?? Iām in for two of any red color but prefer one 625 and one 660 to compareā¦ if there is still time!
LOL. :partying_face:
In the brief time Iāve been here, Iāve found that itās difficult to keep up with all the deals. :person_facepalming:
Add one more for me - total of 3
Please add another XP-E2 625nm to my name. Thanks
Thank you for showing so much interest. We are at 99%! 
I really hope that there would be a deep red version tooā¦ Then I might have another friend who will take one. Fingers crossed!
Iām already one the list. Iāll take two more if deep red will be confirmed.
That makes three C01R for you if I counted correctly. The odds are quite good that we get to see the deep red tint as Sofirn applied for a MOQ of 1.000 pcs XP-E2 deep red 660nm. Since Sofirn is quite busy now and there is no information when those XP-E2 deep red will arrive in their factory, we need to wait for an update from them.
Interessted, would like two if no deep red led is available, three if there is a deep red option
This is excellent news :+1:
And you passed 100%.
Awesomeā¦ Then I will definitely take 2!
interested
Iām in for one 625nm light.
One for me please
Interested in one. Preferably deep red.
Great news! Thank you.