Super brightness: With 4400 lumens brightness at 6500K cool daylight white, these 4ft led shop lights only consume 40W while provide the bright illumination with 250W (6 times more than conventional fluorescent lights). It is an amazing LED Efficiency of 110 lm/w, which can save the electricity expense for you. | "D" shaped tube for durability: This Bbounder shop lighting adopts brand new and creative "D" shaped design aiming to solve 3 major problems that customers encounter most, respectively bending tubes, dark spots and dead lights. | Simple installation: Follow our installation guide for a quick and easy setup with included mounting hardware (56in Power Cord with Plug）! Directly mount to the ceiling or suspend from the ceiling for instant bright shop light in your garages, basements, warehouses, and storage area. | Daisy-chain linkability: 4ft linkable led shop light can seamlessly connect up to 4 lights with plug connections for energy savings in your home, office or any workspace. | Wide application: Bbounder led shop lights can be applied in multiple areas, such as home garages, barns, attics, workshop, workbench, utility room, shed, equipment room, tool room, etc. Let there be light!