Hello! I would like to suggest a self-contained tilt switch . . . One that, when tilted and a contact is closed, sends by wi-fi an "on command" to a (for example) tp-link wi-fi plug. I would use this...

Would be most helpful to be able to program a switch or plug to go on 15 or 20 minutes before sunset. Have a couple of locations that get dark before the "official" sunset time. Same with sunrise.