A lens comprises a base, the base comprising a bottom face facing a light emitting side of a light source, and a top face; a first member comprising a convex part curved outward from a first portion of the top face, and a first light emergent face formed on a top of the convex part; wherein light emitted from the first light emergent face illuminates areas far away from the lens; and a second member connecting to the first member on a second portion of the top face, the second member comprising a second light emergent face; wherein the second light emergent face is at an angle from the top face, the second light emergent face is located at a lower elevation than the first light emergent face in relation to the top face, and light emitted from the second light emergent face illuminates areas near the lens.