Comparison of effective utilization of light
Due to the characteristics of the LED light source, which is like the point light source, the illuminated object emits light in directional light. There is basically no wasted light, so it has a very high light utilization rate, which can reach more than 92%. However, because the high-pressure sodium lamp emits light from all sides, part of the light is blocked by the light source itself and the light-emitting point is large, so it is not easy to do optical design, the efficiency of the lamp is not high, and the output The light spot will not be heavy with the required effective irradiation surface and waste part of the light source, so it will be projected to the surface of the illuminated object through the reflector of the lamp, and part of the light will be lost in the middle. Therefore, the effective light utilization rate of traditional lamps is 55~60%.
