Question about Withings ScanWatch

From a photo of watch faces of all 4 versions, it seems that only the black 42mm has luminous watch hands, and since I have bought that version, I can confirm that it is indeed the case - if you expose them to a source of light for some time, they will then glow in darkness (just hands, not the hour marks on the face). It could also be that the other 3 versions have whole hands covered in paint, but most likely this is not the case.

The hands are luminescent on the large 42mm and only on the black version. I ordered this one and can confirm it.

For me, the hands do not light up, except when I activate the digital display via the button. Once a week, there is a sleep/standstill monitoring, then it lights up red and green underneath the clock (i.e. on the back) all night. This bothers me at some point. I then take the watch off so that I can continue to sleep. I then no longer have the data for the rest of the night, but sleep is more important to me.

The hands do not light up, but the digital display does when you look at it at night.