Sir, - Has anyone noticed how many cars there are out there with only one headlight? Writing as a keen motorcyclist, there is nothing more dangerous. Among the guilty are a surprisingly high number of taxis.I was beginning to despair when I saw a bus with only one light. I told the driver but he only shrugged his shoulders.Last Saturday I was flashing one of the culprits - only to discover that it was a Garda patrol car! - Is mise,Feilim Clear,Kilgobbin Heights,Stepaside,Co Dublin.