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This "16.7M colours" stat that reporters wave around always gets me. It's just 24-bit color, doesn't mean it's "high tech". I can make you 16.7M colours with a $3 microcontroller and LEDs from the hardware store.

What they should discuss instead is the color gamut of the LEDs and how much of the visible light spectrum they can accurately reproduce.

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They aren't writing the article for technologists and color-gamut-philes. If anything, they're writing it for people who fly long-haul and consequently suffer from jet lag when they have actual business to conduct.

Talking about the number of colors the LEDs can produce is far more likely to convey to that audience how this is supposed to work than delving into the kind of details you'd probably have to read the spec sheet on the individual diodes to find.

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