Originally Posted by
Rick_D
Will opine the better choice is one steady and one flashing. Two flashers may or may not be visible sooner, but actually locating the bike and estimating distance will be better served by the steady+flash combo, especially from dusk to dark.
Just a reminder that the study cited in the OP did
not agree with that old chestnut about steady lights making it easier for drivers to estimate distance than flashing lights
...which surprised me too.