> There's a thing I never understood about bike lights - why people use flashing lights? They are distracting like hell, and could probably cause some serious d

> There's a thing I never understood about bike lights - why people use flashing lights? They are distracting like hell, and could probably cause some serious discomfort for people with photosensitive epilepsy. They're more visible than a steady light, but it's very hard to gauge closing distance of just a flashing light. For these reasons I use a combination of flashing and steady lights (both front and rear). As for triggering PSE. They won't. 240 flashes per minute = 4Hz. Perfectly safe. https://en.wikipedia.org/wiki/Strobe_light https://en.wikipedia.org/wiki/Strobe_light " Strobe lights and epilepsy ... There have been no known seizures at or below the 8Hz (or 8 flashes per second) level. Most fire alarms in schools, hospitals, stadiums, etc strobe at a 2Hz rate, which is obviously completely safe. "