I was riding in the dark yesterday and another cyclist passes me on the opposing lane with a bright LED headlight blinking on the bar with another light source blinking on the helmet. It was pitch black.
Visibility is one thing but inducing an epileptic seizure to oncoming traffic is another. Why would anyone use the strobe mode in pitch black conditions? This makes it difficult for the rider to see and difficult for oncoming motorists and bikers to pinpoint the location of the oncoming cyclist due to the disorienting nature of stroboscopic lights.