Efficiency is an important indicator for evaluating the […]
Efficiency is an important indicator for evaluating the performance of LED panel lights. Luminous efficiency is the ratio of the luminous flux emitted by the light source to the electrical power it consumes, in lm / W. Luminaire efficiency refers to the ratio of the initial total luminous flux emitted by the luminaire to the power consumed under the working conditions that the lighting equipment requires protection in lm / W .
"Light efficiency" is used to evaluate LED light sources, and "Lamp efficiency" is used to evaluate LED light sources. The efficiency of the LED light source and the efficiency of the LED light source both represent the efficiency of converting electrical energy into light energy. They are indicators that describe the energy-saving characteristics of lighting products, but their connotations are different. According to the standard of GT004-2012 "LED Flat Lamp for Indoor General Lighting", the measurement should be carried out in an air-free convection environment, the relative humidity should not exceed 65%, the temperature should be 25 + 1, and the LED flat lamp should be in a stable working state.
The luminous flux of the light source in the luminous effect of the LED light source refers to the luminous flux emitted by the bare light source (not yet installed in the lamp). The molecular luminous flux in the efficiency of LED lamps refers to the luminous flux emitted by the lamp when the light source is installed in the lamp, and at the same time uses the power of the required LED control device or LED control device. The power consumed by the LED light source is less than the power consumed by the LED lamp.
The light effect of LED light source is far greater than the light effect of the lamp. The first reason is that when the LED enters the lamp, the color temperature of the LED increases, and the light output decreases; the second reason is the system loss when the light source enters the bulb, using the LED control device or power supply; the third reason is that the optical system passes through the lamp After the light loss. All these factors will cause the light efficiency of the lamp to decrease.
When testing LED panel lights, we found that the following two points must be taken to improve efficiency: First, we should choose LEDs with high light efficiency and brightness, which can not only improve efficiency, but also reduce costs, and more importantly, improve LED panels The quality of the lamp. Secondly, we should make full use of the light emitted by the LED. If we only focus on the brightness of the LED, but fail to improve the design of the light path, we can effectively improve the light utilization rate, which has little effect on improving the efficiency of the LED flat lamp.
