Lithonia Lighting MNSL MV 4-Feet LED Dry Location Striplight, White Lightweight compact-designed channel and cover are formed from cold-rolled steel and painted after fabrication Diffuse acrylic lens providing a single smooth line of light Snap-lock tool-less channel cover for quick and easy installation 80% lumen maintenance at 60, 000 hours; predicted life of more than 50, 000 hours 5-year limited warranty