Thanks Dominik. There is actually an official datasheet for these emitters, Luminus calls it an “Preliminary Product Datasheet”. I remember Simon posted it on BLF, here is the link. Actually people can try asking the dealer for it.
There were already statements in advance that the forward voltage of the SFT-25R was very high and that the tint was often very green, as with Luminus.
My F7-BB-VJ and F9-BB-VJ bins have a noticeable “blue-green” tint to the naked eye at low mode (80mA), but I don’t have a spectrometer to confirm it. Also, when I or others mention “high Vf,” it might be based on the datasheet, where the VJ bin shows a voltage of around 3.7-3.9V at 8A. I’m not sure if that’s considered “high”, but it’s definitely higher than the SFT40.
Another thing is that I think it’s a slight improvement over the CULPM1 and could potentially replace the CULPM1 in the flashlight market, offering more lumens and greater intensity. It might be hard to understand just by looking at the datasheet, but that’s the feeling I and others have. Actually there have always been doubts about the actual lumens of CULPM1, even Acebeam only rated their L19 2.0 CULPM1 version for 1650 lm. There is no rigorous and detailed third-party test of CULPM1 so far, but if there is, I believe it will not be a rival to SFT25(R).