a. Air convection design: Fast heat dissipation. b. Lamp body adopt aluminium alloy and made by integration of die casting molding: lighter and Uniform heat dissipation. c. Adopt advanced waterproof design: IP 65. d. Convex mirror shape lens, make it more condensation:easy to gather light,high luminous efficiency. - See more at: http://www.obals.com/goods/obals-led-high-bay-light-kd-003-cob-45.html#sthash.5byqV1sm.dpuf