First, simply speaking, the lens angle refers to the size of the light-emitting range after the LED product is lit, that is, the beam angle. The reaction is on the wall surface that is the same source of light and light intensity. If applied to reflectors of different angles, the larger the beam, the smaller the center intensity and the larger the spot. For example, the 6° angle beam diagram, from the figure we can clearly see that the light at the center of the beam at 6° angle is obviously brighter than the surrounding, the middle part of the light is called the central light intensity, and the whole light is called the light spot. As the beam angle increases, the intensity of the intermediate light decreases. At an angle of 120 degrees, the brightness of the light in the middle portion is almost the same as that of the surrounding, which is no different from the ordinary light effect of the lamp. Therefore, it is not difficult to conclude that the smaller the beam angle, the greater the central beam intensity, the smaller the spot size, and the better the light efficiency.
The secret to determining the beam angle is the lens angle. The beam angle can be locked by simply adding a lens of the corresponding angle to the bead. At present, the common beam angles on the market are 8°, 15°, 25°, 45°, 60°, 90°, 120°. According to the angle, it can be divided into: narrow angle beam: <20°; medium beam 20°~40 °; wide beam >40°. Professional optometrists, if you want to achieve better light efficiency, narrow-angle beam LED lights are the best choice.
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