i run with my lights on in 400-500 lumens blink mode both day and night. the point is i want to be visible - by anyone and everyone. it causes everyone to go slow as i pass thru so i would say it's extremely effective at getting noticed. when it's bright out, it doesn't have as much of an effect unless its in the person's line of sight. which i often want. but otherwise during the day it's not as bothersome. for dark night conditions i want to be bright and annoying b/c it's so much riskier for us in general out there when the sun sets.
i've done this for quite some time after advice here that i want to be as visible and predictable as i can be - lights help me do that.