Because making sure a dimmable AC circuit will work is hard (plus I would have to actually get a dimmable light then...), the light alarm clock is based around a 12V DC LED lamp.
A nodeMCU connects to NTP over wifi to keep in sync and calibrate the time / date. There is no RTC even though it would be simple to add in the future (again, don't have one).
Current software is pretty bad, but does all I need it to for now.
How fast is that !?! :-) Thank you so much !