David
Just in case the comment vanished into the ether :-)
---------------------
Or depending there are other shades available - warm white, cool white etc.
The thing to talk about is probably "colour temperature".
Digging a little deeper, "smart lighting" with "tunable white" is now quite a thing. I know a few self-builders who have used various ideas about adjusting the type of white between daytime and the evening, for example.
Apple have such a feature in their Smarthome 'Homekit'.
Here is a thread over on Buildhub in a related topic:
https://forum.buildhub.org.uk/topic/13902-changing-the-colour-temperature-of-led-lighting-in-the-evening/I have started another about "Seasonal Affective Disorder" specifically.
https://forum.buildhub.org.uk/topic/16707-colour-temperature-and-seasonal-affective-disorder/Buildhub is a really really friendly forum.
Matt W
(Actually Julian)
David