They are the absolute best lights, in my opinion for nighttime running. But now they have proven even better. Friday evening, my house was engulfed in a major fire. About half of the structure sustained massive heat and smoke damage including the area where my lights were located. As we are working though the house in preparation to gut it, one of the lights was found....unharmed....still functioning!!! Fire is funny. Maybe it wasn’t exposed to as much heat as the other plastic items that were melted nearby, but I’m impressed either way. Thank you for an outstanding product that has kept me safe funny in the dark and helping to rebuild following a fire.