Gadgets Smarthome Health14 July 20261 min read
Light that follows the sun, not the switch
Circadian lighting is easy to oversell and easy to get wrong. Here is the part that holds up.
The claim that light affects sleep is not controversial. Bright, blue-weighted light in the morning helps set the body clock; warm, dim light in the evening does not fight it. Where the marketing runs ahead of the evidence is in how much a lamp can do about a person who is looking at a bright screen until midnight.
Taken as a modest tool rather than a cure, though, it works, and the implementation details matter more than the feature list. The transition has to be slow enough that nobody notices it happening - a light that visibly steps between temperatures gets switched off. The evening end has to reach a genuinely low level without flicker, which is a driver quality question, not a colour question. And the curve should follow daylight where you actually live: a generic sunset is an hour wrong for most of Europe for most of the year.
The other half is the ceiling, not the app. Colour rendering above 95 is what decides whether a kitchen looks like a kitchen at eight in the evening, and it is the specification most cheap fittings quietly omit.
Set it once, let it run, and judge it in a month by whether anyone in the house has touched a switch.
