For the past month, I’ve run the Lupine Piko as a daytime running light for my road biking excursions, and I’ve noted that drivers see me— and adjust course and attitude to my liking.
If you ride where there is any traffic, raise the odds in your favor. The Lupine Piko is very bright, even for daytime use. Vehicles know you’re there. I’m now considering a very bright tail-light, such as one from Dinotte. But I’d rather not pay the weight penalty, so I’m hoping for something very bright with a 2-3 hour runtime and self-contained rechargeable LiIon battery.