What does is mean when rear lights are white?

White rear lights on a vehicle typically indicate that the vehicle is either a motorcycle or a bicycle, which may use white lights for visibility and safety. In some cases, white lights can also signify a vehicle in reverse, alerting others that it is backing up. However, in most standard vehicles, rear lights should be red, as white lights are not typically used for standard rear illumination. Always refer to local traffic laws for specifics on vehicle lighting regulations.