ENVIS LED-CBT-2X4-50W-40K-HL LED TROFFER - COLOR TEMP. 4000K - CRI 80 - LENGTH 48 IN., WIDTH 24 IN., HEIGHT 3-1/4 IN. ? 3743 LUMENS - VOLTAGE 120/277 - 43 WATTS - LUMENS PER WATT 97 - TEMP. RANGE -20 TO 104 DEGREES QTY 1