The LZPT troffer offers a shallow profile for restricted plenum spaces and patented telscoping housing simplifies installation, even in the most restricted spaces.Housing depth of only 1 1/2" - no taller than standard T-bar, Does not intrude into usable plenum space, Unique telescoping housing minimizes installation depth and simplifies installation, Long-life, 60,000 hour LEDs at L80 (80% lumen maintenance) reduce life cycle maintenance costs, Four LED color choices, Multiple lumen packages ranging from 1900 to 9100 nominal lumens, Superior color consistency to a 3-step MacAdam ellipse and 82 CRI, Soft, uniform light distribution provides excellent vertical illumination free from harsh contrast, QR code traceability, DLC® (DesignLights Consortium) Qualified - see www.designlights.org, Five year warranty,