Integrating spheres are actually fine for measuring monochromatic light sources, there is no inherent reason why not. It does demand a more precise spectral sensitivity calibration but that should be ok with a commercial sphere.
There is a reason though not to want to publish the numbers too loudly, at 660nm the human eye semsitivity is very low,
the same radiometric power level that gives you 150lm in white light, gives only maybe 20lm in 660nm. That does not sound impressive (and because it does not look impressive either, it is still fair to use the lumen for these leds).
Thanks for the information Djozz. I take back my assumption that standard equipment is less appropriate to measure monochromatic light. Maybe there's a way to help Sofirn measure red light more accurately?
This is really strange as I can see those pictures here. Apparently, it must be some routing problem between www.abload.de and US internet providers. I never had any issues with abload.de so far. Maybe everything will be resolved in a few hours. If not, I will think about using another image hoster.
Glad to hear this is moving forward! And the new UI sounds great. Did they say if this will be implemented in future batches of the regular C01s, as well?
I’m not picky, especially since I know not many anodizing shops offer much variety in colors. However, if they can do a wine red, that would be a great match for a deep red emitter. I’m envisioning and anodizing color similar to the “French Rose” that Sunwayman offered at one time.
If I get a chance, I will try to remember tonight to take a picture of my deep red anodized Sunwayman R01A next to my red anodized Sofirn C01 as a point of color comparison.
Luminous flux (measured in lumens) is adjusted to human eye sensitivity, where as radiant flux (measured in Watts) is not. So 0.5 lumens of red should provide the roughly the same brightness as 0.5 lumens of white, but the radiant flux will be higher, and the runtime will be shorter.
Of course, how useful the illumination of that 0.5 lumens is will depend on the colors in the scene. Red light won’t illuminate blue or green objects, for example, while white light will.
I see it OK on my Windows 7 PC with Brave browser - but it takes a few seconds to load. Perhaps it is a bandwidth issue with the Abload host. It's probably temporary as they have been very reliable in the past. But it doesn't hurt to donate to them from time-to-time to help offset their bandwidth cost. I host pictures with Abload and try to donate some coin at least annually.
Finally after years peoples begin to consider this problem the inhibition of melatonine caused by neutral and cool white Led lights(by the natural emission of blue from Led)
But they are still the most requested and sold
I would see more very Warm/Amber Leds lights
That third image in your first post is hosted on https://www.taschenlampen-forum.de, and apparently you need to be logged into that taschenlampen forum to be able to see that image. I can’t.
I love this proposed selectible UI, and would like to see it eventually ported to its big brother - the C01S!
A wine color that one cannot confuse with a red C01S is a good choice IMHO. I also think that a dark clip (like the one that comes with the C01S) would work well.
The odds are good that the next batch of Sofirn's C01S (with SST-20 4000K 95CRI) will be using the new UI, too. The cost increase will be around $ 0.50. Barry asked me about my opinion and I said that's a minor price increase which should be easily outweighed by the benefits customers would get, i.e. a reversible mode order and three instead of only two modes. The poll I've run here on BLF has revealed that most people favor this new UI.
Thanks. I've changed that and linked the picture to abload.de. I hope it's visible to everyone, now.
Wine red would be fine for me, otherwise “normal” red would work as well.
mode memory is fine and preferred sequence would be L-M-H
And a sub-lumen brightness would be fine as locator in the dark, I wonder how long the battery would last in that mode…
add me for one more!
I also think that a dark clip (like the one that comes with the C01S) would work well.