Sea-Dog LED 20 Lumens Alcor Courtesy Light Blue. This high quality 1-1/2" diameter round light with one LED bulb can be mounted to cast light down up or to the side depending on the required application. Specifications for Sea-Dog LED 20 Lumens Alcor Courtesy Light: Manufacturer: Sea-Dog Age Group: Adults Application: General Package Contents: Sea-Dog LED Alcor Courtesy Light Sea-Dog 401413-1: LED 20 Lumens Alcor Courtesy Light Blue