Novelty Lights 39006 C-Clip Christmas Light Clip, C7/C9 Base, Flat Surface Facia Mount, 25 Pack 25 Pack of C-Clips for C9 and C7 Sockets Roofline Flat Surface Installations: The C7 or C9 will point Horizontal Mount Using Screws, Glue or Caulk Bulbs Project Horizontally Use For Mounting C9/C7 on Flat Surfaces Permanetely