I checked that out and discovered that during daylight hours there are no requirements or restrictions on bicycle lighting. Other cities/counties/states may differ, but here it is fine. At night, we are required to have red in the rear and I could be pulled over if I tried to use the white flasher, but I wouldn't do that anyway. 1., the light is extremely bright in flash mode and although not blinding it is distracting enough to be dangerous; and 2., I imagine that under some circumstances it could be construed as a headlight and may confuse a driver.