A photopic lumen does, yes. The problem is that at night you are shifting into the scotopic range, and this is why the sensitivity shift occurs. This shift is essentially done in the mesopic range, which falls between the full daylight luminances of photopic, and moonlight luminances of scotopic. Not the luminance of the moon, but the luminance of the earth while illuminated by the moon.

This is complicated, but trust me, in the luminance ranges that you are riding in at night, a blue source is going to produce 10-15% longer detection distances.