IT may be worth considering (seeing how easy it is to have working lights) that "stuff happens"
You may "intend" to get home after a good day out before it gets dark.... but then some "stuff" that you did not expect to happen does.
This "stuff" will always happen just when it is the worst place possible for it to happen; it's the law.
Imagine having to leave your pride and joy next to "Hoody heaven" because you cannot see to ride home.
Or even in the middle of nowhere, because you cannot get a signal on your phone, or the battery on your phone is flat and the bike is too heavy to push over the next hill.....
might be worth a thought?