A big N-O to blinky headlights
You’re on a bike, not running a discotheque. A steady front light with a lowish brightness for a DRL seems to work fine because I think it’s main safety impact is at intersections where everyone is at close quarters and boosting your visibility without blinding or annoying folks is what you’re going for.
For rear lights I think as bright as possible either blinking or steady because you want to be seen from far away. If you have two lights, one on the sear stay and one on the seat post I think it helps cars judge the distance to you a bit better than a single light.
But, if you’re in a group ride please change your rear light from blinking to steady, you’re hypnotizing the guy behind you.