LED Bollard Lights are easy to retrofit. Here are a few pictures of some installations we have done using our LED Corn Cob light in an older bollard light fixture. As you can see it fits nice inside the fixture and provides great light. Depending upon where the light is located we suggest using a 5000K color light. Usually bollards are on walkways and are used for security reasons so the brighter the better. You can get these in a 2800K color which is more of an orange looking light for a more subdued look if that is what you are looking for in your application.