A spike for outdoor lighting fixture includes a receptacle portion integrated into the body of the spike with an open section and a removable transparent window that is configured to enclose the receptacle portion. The transparent window is attached to the receptacle portion using one or more screws or other fasteners. The spike can include an internally threaded upper portion for receiving a post upon which a lighting fixture is mounted and/or a lamp socket can be attached to the top of the spike and a protective housing fitted around the outer edges of the top of the spike. In a preferred embodiment, the receptacle portion is divided into multiple compartments, e.g., for storing excess cable or spare parts, or for securing connection points of a wiring installation. The transparent window permits visual examination of the connection within the receptacle without removing the transparent window.