The lamp adopts aspheric plano-convex optical lens, the light transmittance reaches 92%, the spot uniformity is high, the illuminance distribution curve projected by the lamp is smooth, and it is a continuous sine wave change. Solved the problem of black spots appearing in the center of ordinary spherical spotlights, making the stage effect more perfect. When the projection distance of the same type of spotlight is 30m, the illuminance is about 500Lux when the diameter of the spot is 2.5m, and there will be a black spot in the center, while the aspherical lamp can reach 900Lux under the same conditions, and the spot is uniform. It can better solve the problem of long-distance light projection.