i've been happy with the owleye rear blinking light. i think it's south korean. a little hard to find. a local lbs used to carry it before they moved to portland, or.
bought some backups for other bikes off amazon for about $40 apiece. usb charging. seatpost adjustable mount. i get about 7-7.5 hours use set on "blinking"
mode. have never used the steady mode but the literature says 2 hours. do most of my riding during the day but have done plenty of night rides and run two
on blinking mode day or night. have had several other cyclists and motorists (whom presumably cycle) ask me about them. compared to what else i've seen on
day/night riders here in san diego, i feel better illuminated.