Fluorescent Lampholders Medium Bi-Pin G13 for T-8/T-12 Lamps. White polycarbonate body, rated 110 degree C. Turn lock type. Available with centre hole for butt on mounting, side slots, mounting grooves or mounting brackets. Available shunted for use with rapid or program start electronic ballasts; saves time and makes wiring easier. Many models to choose . Two wire ports per terminal for easy harness wiring.