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led fluorescent lamp power supply built-in and external strengths and weaknesses
2013-02-14 19:46:54
led fluorescent lamp power supply built-in and external strengths and weaknesses
Due to power built-in power supply heat also added to the tube, and assume that the power efficiency of 88%, so there is 2.4W heat should disperse heat equivalent will soon be increased to 30%, which means that a total of 10.4 W of power can not be dissipated. The LED heat a difficult or shorten LED life more. Moreover, the length of the power supply is about the fifth of the length of the lamp, the thermal power of the hair is also concentrated in this paragraph there, so close to the power of these LEDs by the hot baking and thus life more than elsewhere LED short, lamps damaged, close to the power section of the first black out. It can be that the built-in power supply LED fluorescent lifetime of not more than 10,000 hours.
And power on the tube inside the power supply itself but also to withstand the high ambient temperature generated by the LED, which greatly reduces the life of the electrolytic capacitors in the power supply, will reduce the lamp life.
Built-power LED lamp life of 10,000 hours compared to 50,000 hours and an external power supply, the use of cost obviously high five times. Not only that, in the process, whether it is damage to the LED, or the power supply is damaged, usually two to be together discarded. External power LED lamp can be bad which lost which.
In addition, the built-in power-type increase the cost of recycling electronic waste. Because the power section must be ripped out and dealt with separately.
External power supply, not only high efficiency, long life, but can also increase the dimming manually or automatically dimming special features, these are built-in unmatched!
Built-in shortcomings and problems can be summed up by the above description we are very serious, and unfortunately, some people just covet it may purchase 10% cheaper, and despite its high cost five times more. Really can be described as a small loss of large, more harm than good!