My lights go on 14 different bikes. The trike has it's own set. I need something that fits all my bikes, and is easy to switch to another bike. I don't want
anything more complicated than I have now. I can turn on the headlight and the tail light while riding anyway.

Edit: Also, I turn my lights on when the shadows start to get long in the afternoon. Unless I stop for some reason, they stay on until the bike is on my porch. I do change the headlight brightness for a big fast down hill, But I already can do that while moving. There is just one button on my light head on the handlebars. If I wanted to turn it off while riding, I can.