Question
DALI DT8 Tunable White encodes colour temperature in mireds (micro reciprocal degrees, M = 1,000,000/K) because that scale is perceptually linear, but user-facing tools always display the value in Kelvin (3000 K = 333 mireds, 6500 K = 154 mireds).
DALI-2Mock examDT8 ColorHard
Answer
True
Mired and Kelvin trade off intuitiveness against perceptual linearity. Kelvin is intuitive for users but perceptually non-linear (a 1000-2000 K shift is huge, 6000-7000 K barely visible). The mired scale is perceptually linear — a constant shift in mireds corresponds to a constant perceived change. DT8 transmits in mireds internally, while tools convert between K and mireds for the user. Typical commercial LEDs span 2700-6500 K, i.e. 370-154 mireds.
Preparation tip
When animating Tunable White (circadian curve), interpolate in mireds, not Kelvin — linear Kelvin ramps look fast at the warm end and frozen at the cool end.
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