yup. if you need to see, use a steady light. if you need to be seen, blinking is better at getting attention - faster blinking is better than slower blinking. if both seeing and being seen is a concern, then run one light blinking AND one light steady.

FWIW, i run a PB blaze 2W (about 80lm) flashing, day or night. anything other than bright sunlight i also run a lightstar300 (about 300lm) on steady.

i usually (pretty much always, these days) run two 1W rear lights, flashing, about 35lm each. tonight i rode home (in the rain) with two PBSF turbos flashing... and i noticed that cars were eager to not be close behind me, and they seemed happy to use the other lane to pass . for the money, those are pretty harsh lights