I had 2 different people comment on my lights during my 61 mile Labor Day ride last week. One guy doing yard work commented as I rolled by that he could see my flashing headlight from way back at the corner (at least 1/4 mile away, others have said they can see it from nearly a mile). And then later on a friend on Strava said that he saw me that morning and could see my 2 flashing rear lights from nearly a mile away.