Mistake 1: The higher the power, the higher the brightness
The brightness of LED panel lamp is measured by luminous intensity, namely the luminous flux emitted by unit solid angle. Generally speaking, the light source will emit its luminous flux in different directions with different intensities. The visible light radiation intensity emitted in a specific direction per unit solid angle is called light intensity, which is called axial brightness for short. If the current works fast, the electric power will be large; If the current works slowly, the electric power will be small. In other words, in the same time, the more work the current does, the greater the electric power will be. In LED, the greater the power is, the higher the brightness of the product will be. Therefore, consumers should pay attention to the axial brightness rather than power when purchasing LED lamps.
Mistake 2: The expectation of actual service life is too high
LED manufacturers expect LED life to reach 100000 hours, but like all basic light sources, the luminous flux lumen of LED panel lamps also decreases over time. Therefore, although the LED panel light can emit light for a long time, MTBF is not the only consideration for determining the service life. LED lumen attenuation is affected by many environmental conditions such as ambient temperature, humidity and ventilation. Lumen attenuation is also affected by control, thermal management, current levels, and many other electrical design considerations. Therefore, when purchasing LED, consumers should pay attention to its light decay speed rather than its service time. Consumers should not expect too much of its actual service life.
Mistake 3: Take the actual luminous angle as the effective angle
The luminous angle of LED panel light is divided into effective angle and actual luminous angle. The included angle between the direction where the luminous intensity value is half of the axial intensity value and the luminous axis is an effective angle. The angle of view is twice of the half value angle, which is the actual luminous angle. The angle beyond half of the axial intensity is not included in the effective angle in practical application because the light is too weak. Therefore, consumers should pay attention to the actual luminous angle of products when purchasing panel lights. When calculating the number of products used in the project, the actual luminous angle shall prevail, and the effective luminous angle can only be used as a reference value.
