At the moment the slider for color temperature has low color temperatures (yellowish tones) towards the right, and high color temperatures (blueish tones) towards the left. I do suspect this is the wrong way round, and an artefact of implementation, not a sensible UI decision for the following reasons:
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A bulb icon is displayed on the left (next to the blueish daylight shades). This feels very wrong. In e.g. digital cameras a bulb is the symbol for yellowish color temps, and a sun or fluorescent bulb is the icon for higher color temps.
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Not a single piece of software I have ever used had color temperature axis (in K) run from right to left (with higher K on the left). Not the Hue app, nor photo apps.
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I suspect this all comes from the implementation choice of “mireds” in the Philips system, which might be sound from a technical point of view, but bad in a graphical UI. “mired” is a rather historical, uncommon unit, one that end users are not used to. On the packaging of light bulbs there are no mired values but K color temperatures (e.g. 2700K for yellowish white bulbs). Even Philips own Hue GUIs hide this implementation detail and mention mired nowhere as far as I can tell, except for developer API documentation.
For these reason please consider switching directions if possible. Or please add another icon for high K color temperatures instead of the bulb icon, maybe even additionally move the bulb icon towards the right.