Transom lights for boats are easily attached before the boat is towed on a trailer. Each light includes a housing attached to a post, a major lens and a minor lens. The transom light circuitry is connected to the electrical circuitry of the towing vehicle. The housing is rigidly affixed to the post and in an alternate form the housing is pivotable to better conform to the shape of the transom. A socket can be readily attached to the transom for slidably receiving the post. Before the boat is placed in the water the transom lights are disconnected and removed.