Lamp Two 24W, 39W or 54W high lumen T5 High Output fluorescent lamps by GE, Philips, or Osram-Sylvania Miniature bi-pin base. Sockets Spring-loaded sockets with 90° rotor lock allow for lamp tolerances and simplify lamp installation Spaced apart to enable easy lamp replacement without tools. Aiming 90° vertical aiming capability. Connections Two standard trac adapters. Adapter Copper alloy contacts provide precise spring action - no arcing and will not take a set True, positive electrical ground On/off switch included Patented embossed polarity arrows on bottom of adapter Spring-loaded positive latch with embossed polarity arrows secures trac light to trac “Pull-up” contact to up position for two-circuit application. Housing Extruded aluminum channel with die-cast aluminum end caps Rich, textured paint in a variety of finishes. Reflector Computer designed specifically for T5HO lamps to offer optimum performance Specification grade, highly reflective and minimally diffuse aluminum material provides wide, uniform beam pattern with optimized intensity, minimal glare and peak operating efficiency. Ballast HPF Electronic 120V End of lamp life protection. Louver Precision formed, brushed stainless steel blades provide shielding  Thin cross section maximizes light output Clear cathodic electropaint finish maintains appearance with low maintenance Attaches without tools to facilitate installation and lamp replacement Included on all models. Lamp Containment Barrier Food service compliant lens/barrier made from clear extruded acrylic Attaches without tools via permanently mounted spring clips to facilitate installation and lamp replacement Sold as an optional accessory. Labels UL listed, CSA certified.