Perko Alpha Series Universal All-Around Navigation Pole Light - 30" Pole White. In addition this design also provides limited cockpit illumination. Specifications for Perko Alpha Series 24" All-Round Light: Manufacturer: Perko Color: White Features of Perko Alpha Series 24" All-Round Light Replacement Stow-A-Way Plug-In Type Black Plastic Top with White Translucent Globe Selective Use of 2 Screws Holes and or Collar Allow for Use In Multiple Applications Package Contents: Perko Alpha Series 24" All-Round Light Perko 1400DP3CHR: Alpha Series Universal All-Around Navigation Pole Light - 30" Pole White