This linear fitting is IP66 waterproof rating, adopts innovative knob for quick installation, easy for connecting power supply with quick terminal block, no need to use tools and screws. Adopts high brightness SMD2835 light source,opimized optical design on diffuser and flicker-free driver, which makes higher lumen output and light distribution even and soft, no glare, no flicker. It can be with sensor dimming function. Economic light solution for underground parking lots, underground passage, warehouses, stair well, long corridor, tunnel and boat application. Features High-grade aluminum heatsink and anti-UV PC housing. IP66 waterproof rating and IK10 high intensity High transmittance(88%) PC diffuser 220lm/W LED chip as the light source(approval by LM-80) high efficency,flicker free driver Surface mounted/hanging installation End cap knob type, quick wiring terminal block for easy installation sensor dimming function with remote setting (option) Linkable connection function(option) Approved by CE ROHS SAA and C-Tick (RCM). 5 years warranty.