LightScene said:
How do you know that the led's in a Nuwai originated from Lumileds?
You can tell by looking. If you have any doubt about a particular light, ask on CPF. Plenty of people know about each light.
To me it doesn't help to make a pronouncement that these "Luxeons" aren't as reliable as the ones that come in expensive flashlights. They are basically the same, and they may in fact be identical. It may be that counterfeiters are producing "fake" Luxeons at the same facility where they make "real" Luxeons.
Clones are most definitely not leftovers from a Lumileds factory. They are made by random Chinese companies trying to copy the Luxeon.
Ask anyone who's been on CPF for a while and who's been paying attention, and they'll confirm that Luxeons are fairly consistent and reliable, and clone LEDs overall are not up to the same quality. That's not to say that
all clones are poor quality. But since they're clones, we don't know who makes them. It could be one company, or a dozen companies. There's no way for us to identify which clones might be good and which aren't, and there's no way to know which clone a particular light comes with. Clone light suppliers can even switch LEDs without anyone knowing.
Luxeons, on the other hand, come from a single supplier with a long history and demonstrated reliability.
I'm not trying to say that clone LEDs are bad. But they're not Luxeons, and there is a difference.