2x4 LED Troffer 50W Lithonia Lighting Stack

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A Troffer That Lights the Room, Not Just the Desk Built on Lithonia Lighting's STACK platform, this troffer takes a different approach to commercial illumination than a standard la y-in troffer. Its volumetric center basket optic spreads light across walls, partitions, and vertical surfaces rather than concentrating it downward which creates a more balanced, comfortable environment for the people working or moving through the space. Volumetric Illumination, Not Just Task Lighting: Standard troffers direct most light downward, leaving walls and vertical surfaces relatively dim and creating a flat quality of light. The STACK's center basket optic is purpose-designed to redirect a portion of light outward toward walls and partitions, creating balanced illumination that renders the space and its occupants more naturally. 1.9" Depth for Tight Plenums: At only 1.9" deep, this troffer installs comfortably in plenum spaces that standard-depth troffers can't fit — no modifications to the ceiling grid, no special hardware. Fits Both T-Grid Types: Compatible with standard 15/16" and narrow 9/16" T-bar ceiling systems, with easy-to-position attachment clips included — no adapter required for either system. IC-Rated for Insulation Contact: Rated for direct contact with ceiling insulation, making it suitable for top-floor installations and spaces where insulation is present directly above the plenum. Damp Location Listed: Approved for use in restrooms, locker rooms, and other damp locations — broader application range than a standard office troffer. 0-10V Dimmable: Dims from 100% down to 10% for compatibility with standard dimming controls and daylight harvesting systems. DLC Premium Listed: Qualifies for the highest tier of utility rebates. Buy from ELEDLights to get full rebate support. Ideal Applications Offices & Open-Plan Workspaces: Volumetric illumination reduces the flat, washed-out quality of standard downlight-only troffers, creating a more comfortable visual environment for extended desk work. Schools & Classrooms: Balanced light on walls and vertical surfaces reduces eye strain for students facing whiteboards and wall-mounted displays so they can focus on learning without distractions. Healthcare Facilities: Damp location listing and balanced illumination suit exam rooms, corridors, and patient areas where light quality and hygiene compliance both matter. Retail & Commercial Spaces: Wall illumination helps merchandise and signage read clearly without requiring separate accent lighting. Tight Plenum Installations: 1.9" depth fits in restrictive plenum applications where standard troffers may not — particularly useful in renovation and retrofit projects where ceiling depth is constrained. Damp Locations: Restrooms, locker rooms, and break rooms where a damp-rated fixture is required but a specialty fixture isn't necessary. ELEDLights Stands Behind It DLC Premium listed — qualifies for most utility rebate programs US-based support Monday–Friday, 8am–8pm EST — call, text, or email a real person In stock, ships fast straight from our U.S. warehouses LIthonia SKU: STAK 2X4 6000LM 80CRI 40K COL MIN10 ZT MVOLT Show more