Advantages and disadvantages of built-in and external LED fluorescent lamp power supply
Since the power supply is built-in, the heat of the power supply is also added to the tube. Assuming that the efficiency of the power supply is 88%, there is 2.4W of heat to be dissipated, which is equivalent to an increase of 30% of heat, that is to say, a total of 10.4W The power cannot be dissipated. It makes the heat dissipation of the LED more difficult, or in other words, the service life of the LED is also shortened. Moreover, the length of the power supply is about one-fifth of the length of the lamp tube, and the heat generated by the power supply is also concentrated in this section, which makes the LEDs close to the power supply burn more hot, so the lifespan is longer than that of LEDs in other places. Short, when the lamp is damaged, the section close to the power supply will be blacked out first. It can be considered that the life of the LED fluorescent lamp with built-in power supply will not be higher than 10,000 hours.
And put the power supply in the tube, the power supply itself has to withstand the high ambient temperature generated by the LED, which greatly reduces the life of the electrolytic capacitor in the power supply, and also reduces the life of the entire lamp.
Because the LED fluorescent lamp with a built-in power supply has a lifespan of only 10,000 hours, compared with the 50,000 hours of an external power supply, its use cost is obviously 5 times higher. Not only that, during use, whether the LED is damaged or the power supply is damaged, usually both must be discarded together. And the external power supply LED fluorescent lamp, you can lose whichever is broken.
In addition, the built-in power supply also increases the cost of recycling and processing electronic waste. Because the power supply part must be disassembled and processed separately.
External power supply, not only has high efficiency and long life, but also can add special functions such as manual dimming or automatic dimming, which are unmatched by the built-in type!
From the above introduction, we can conclude that the shortcomings and problems of the built-in type are very serious. Unfortunately, some people just covet that it may be 10% cheaper at the time of purchase, regardless of the use cost is more than 5 times higher. It can be said that the small loss is not worth the loss!
