A: Big.
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LED lamp beads heat, easy to break, the cost is not low, it in the end is not energy-saving? It should be said that the description of the subject is not accurate, if so, then LED not only does not save energy but also does not save money. In fact, LED or energy saving, the measure is to see how its light efficiency.
The unit of light efficiency is \"lumens per watt\". That is to say, each watt of electrical power can be converted into how many lumens of luminous flux. As incandescent lamps are about 15 lumens per watt, fluorescent lamps are 60 to 90 lumens, and market-oriented leds have reached nearly 200 lumens\/watt (higher in the laboratory). Therefore, under the premise of achieving the same lighting effect, LED can save about half of the electricity, and the energy-saving effect is obvious.
The heat of the LED is actually an illusion, because many high-power LED lights are equipped with bulky heat sink, which makes many people feel that the LED heat is very large, otherwise what to do with the heat sink?
It should be said that the heat sink is not because of the heat, but the LED is most afraid of heat. Too high temperature affects both light efficiency and shorten life, so heat dissipation is crucial. As long as the current is appropriate and the heat dissipation measures are in place, the life is much higher than other light sources.