What does the color look like? Producing light that falls within the white region of the CIE diagram is one thing… if it’s too yellow or too blue it could be an issue. Maybe that’s something that can be worked out over time.
The article does not explain what they use, but it seems to imply that there is no fluorescent conversion layer and the white light comes directly from the LED.
That could be done if the LED actually contains a multiple structure combining red, green and blue LEDs, but in the past such a combined LED had the disadvantage that in time the efficiency of the 3 components degraded at a different rate, which resulted in a color shift.
For now, the luminous efficiency of this LED is quite poor, unsuitable for lighting but only for indicator LEDs or display applications, but they claim that for such small LEDs even the traditional LEDs had poor efficiency and they hope to improve the efficiency later to more acceptable levels.
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Indeed. Would love to see a spectrograph
Even if it's perfectly centered on a nice blackbody point, if the spectral distribution is spiky, it will still look bad in real-world usage
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