On my '35 Colson Rover, I have a headlight, and motorcycle horn. Although you can of course get a horn that is slightly smaller and specially intended for bicycles, I chose the motorcycle horn because it is a lot louder, and it uses the same size bracket, so I figure why not. They also tend to be slightly less expensive when you do find them for sale. Here in my town, there are red-necks who scream out the car window at bicyclers, and people who blow their horn because they don't believe bicycles should be allowed in society, so it can be good to have a loud horn that such people can hear clearly in response! And a headlight is good to have for when you're out after dark. This bike is also equipped with a pair of rewired light-up grips, contemporary to the bike and made of, I guess, Catalin plastic.