A lighting system comprising: at least one light source; a diffusion plate for diffusing the light emitted from the light source; an auxiliary diffusion sheet for further diffusing the light diffused by the diffusion plate; and a light-collecting plate for collecting light diffused from the diffusion plate and the auxiliary diffusion sheet and radiating the collected light; wherein the diffusion plate and the auxiliary diffusion sheet are provided between the light source and the light-collecting plate and the auxiliary diffusion sheet is attached on a top surface of the diffusion plate; wherein the diffusion plate includes diffusion beads regularly or irregularly therein to diverge a path of light output from the diffusion plate, at least one lens for collecting the light diffused from the diffusion plate and the auxiliary diffusion sheet and radiating the collected light, and for controlling a radiation path of the light is formed on one surface or both surfaces of the light-collecting plate, the at least one lens is an MLA with an array of micro size lenses that are formed convexly, the lens uses, as 0.4 to 0.8, as a ratio (H/D) of a diameter of the lens to a height based on a plane of the light-collecting plate, the lens is formed to have a diameter within the range of 30 μm to 80 μm, the MLA is formed by using a density rate of the lens with respect to an area of the light-collecting plate as 65% to 90% characterized in that: the light-collecting plate uses a polycarbonate resin material, and the lens uses acrylic resin and has a refractive index of 1.45 to 1.65. at least one light source; a diffusion plate for diffusing the light emitted from the light source; an auxiliary diffusion sheet for further diffusing the light diffused by the diffusion plate; and a light-collecting plate for collecting light diffused from the diffusion plate and the auxiliary diffusion sheet and radiating the collected light; wherein the diffusion plate and the auxiliary diffusion sheet are provided between the light source and the light-collecting plate and the auxiliary diffusion sheet is attached on a top surface of the diffusion plate; wherein the diffusion plate includes diffusion beads regularly or irregularly therein to diverge a path of light output from the diffusion plate, at least one lens for collecting the light diffused from the diffusion plate and the auxiliary diffusion sheet and radiating the collected light, and for controlling a radiation path of the light is formed on one surface or both surfaces of the light-collecting plate, the at least one lens is an MLA with an array of micro size lenses that are formed convexly, the lens uses, as 0.4 to 0.8, as a ratio (H/D) of a diameter of the lens to a height based on a plane of the light-collecting plate, the lens is formed to have a diameter within the range of 30 μm to 80 μm, the MLA is formed by using a density rate of the lens with respect to an area of the light-collecting plate as 65% to 90% characterized in that: the light-collecting plate uses a polycarbonate resin material, and the lens uses acrylic resin and has a refractive index of 1.45 to 1.65. the light-collecting plate uses a polycarbonate resin material, and the lens uses acrylic resin and has a refractive index of 1.45 to 1.65.