@23331658 Thanks for reaching out!
Here are a few suggestions for what you are looking for in a rear bike light:
Personally, I've had great success with bike lights from both of these brands. The second Planet Bike light and the NiteRider have rechargeable batteries while the first takes 2 AA batteries.
Hope this helps, thanks!
Guess I am late to this question, but this is the greatest rear light I have found.
Lezyne's Zecto Drive Max Rear bicycle light, is bright, good for both daylight and night rides. It is not over priced, but could be expensive if you leave your bicycle unattended. This light will can be seen, and it has a warning not to look directly into the light...
Before Covid I looked for lights that had an angle to mount low on seat stays and not blind the rider behind you in a group ride. Never found any that would tuck neatly against the seat stays, many you could attach to seat stay and adjust the angle of the larger wind disrupting light, but not anything aero.
Have not researched recently as I ride solo currently...