Crescent Fluorescent Premium Grid Troffer 4-54W T5 High Output 120-277v Troffer

Ultra high efficiency with a minimum of 83%. Hemmed door frame provides extra rigidity & no sharp edges. Integral "T" hinges. All sides are turned in and hemmed for safe handling and installation. Mitered door frame includes unique light-blocking construction which eliminates any need for gasketing or baffles. One-piece ribbed unitized housing with interlocking corners maintains structural integrity. Spring loaded cam latches firmly secure frame on either side. Easy lamping. No special slots or holes necessary for insertion of lamp pins. All lamps can be individually installed or removed in any order. Built-in seismic tabs. No need to purchase separate clips. UL-listed twin knockout access plates. Captive-bolt ballast mounting. Four corner tie points for safety wire support when required. 3" shallow design.