Perko's Alpha Series Universal replacement lights are designed to fit most other manufacturers' bases. They feature two collars (one threaded and one locking), two screw positions, and a full output translucent globe (360°). Traditional white translucent globe allows for all round visibility even when globe orientation is not horizontally aligned. In addition, this design also provides limited cockpit illumination. The 1400 Alpha Series models also feature an adjustable pole rake.