The present disclosure is directed towards a luminaire having an optical waveguide and a light source. The optical waveguide has a hollow cylindrical structure with a first surface and a second surface at the opposite ends of the cylindrical structure and an external surface and an inner surface extending between the first surface and the second surface. The light source illuminates the first surface of the optical waveguide. The external surface of the optical waveguide is constructed such that the light from the light source exits from the inner surface. The luminaire directs the light from the light source towards the nadir and prevents glare to the eyes of the people in the surrounding space.