Axiom Home Page Forums General Discussion Home Theater Skiing Ninja. Anyone heard of this

Much like your comment about how test gear cannot compete with the human senses, this statement is also wrong. The human realm of sense is severely limited, and easily fooled. Test equipment can measure, distortion, amplitude, frequency, and phase variation with more accuracy and consistency than a human who can't directly compare two passages separated by five seconds of time, and is often fooled into thinking something sounds better simply by increasing the volume. Think too of optical and aural illusions as an example of how easily our senses can be mislead.

That's not the point of this post. I don't know where you go the idea that the designers of "white" LEDs don't know how they work, but they do. I put "white" in quotes, because white LEDs generally do not emit white light. The most common kind are actually blue, in the 10000 Kelvin range, which fool our limited sense of vision into seeing white. Others which actually do have a more complete spectrum use a phosphor mix, similar to that used in (cheap) fluorescent lights, and the diode emits UV light which is used to excite this phosphor. The third style combines 3 diode junctions which each emitting coherent light centered at red, green, and blue respectively; the combined light appears white.