Suggestion for night running : auto lauch livetracking

I just get it to automatically text my wife when I start the activity even though 90% she is running right next to me

Yes the goal is to have a "smart" email send just when its night outside. I don't need to share my track duing day or to receive tracks from my wife during day. But it would be safer for both of us to have an automatic share during night

Yes, edit the run settings > Flashlight > Type of flash (blinking and colour) and when (night).

I know it and use it for light :) I want to auto launch livetracking when night

Yes, yes… now I read

Hence the live tracking is dependent on connected phone maybe ”Find My” (iPhone) for example can be used instead? Still need to bring a phone  

Me and my white use that all the time. 

Yeah I know that there are alternatives :) and thanks for your suggestion, the goal of my post was to suggest to Garmin Dev Teams to add this feature in the watch :) 

• There is a feature to autolaunch livetracking 
• There is a feature to activate Flashlight after sunset

It should be possible to have a feature to autolaunch livetracking after sunset :)