I was running a Cygolite Metro 360 on the handlebars. Strobe didn't work in dark as I needed the route lighted constantly. Even constant high light just blended in the motorist's background and cars with brights on, continuously blinded me . Now it's helmet mounted Metro 600 in the dark on constant mode with "stutter". Higher mounted, brighter and directional sees most motorists dimming their brights when approaching. The 360, in flash mode, takes care of day riding.