Home > Knowledge > Content

Why does the LED lamp heat up so severely

Jan 04, 2021

Why does the LED lamp heat up so severely?

In comparison with incandescent lamps and energy-saving lamps, LED lamps can indeed save electricity. The luminous efficiency of ordinary incandescent lamps is about 18 lumens per watt, the luminous efficiency of energy-saving lamps is about 56 lumens per watt, and the luminous efficiency of LED lamps is about 150 lumens per watt. At present, the light efficiency of LED lights is relatively high, and the effect of energy saving and electricity saving is also very obvious. Here comes another question. Since the power of the LED lamp is low and the light efficiency is high, why the heat of the LED lamp is still very serious?

As we know that even for relatively energy-saving LED lamps, only about 20% of the electricity is converted into light energy (visible light part); of course, the traditional incandescent lamp is even lower, only about 3% of the electricity is converted into light. Can (visible light part).The spectrum of LED lamp is mainly concentrated in the visible part, so its luminous efficiency is relatively high. However, this also brings a problem that the heat emitted by the lamp cannot be radiated by infrared rays, and the radiator must be used to dissipate the heat. However, the traditional heat source emits a lot of heat, which is radiated in the form of infrared rays, instead of requiring a bulky radiator.In fact, there is still a lot of room for improvement in the utilization of electric energy by human beings. Now LED lights only use 30% of electric energy to convert into visible light. In the future, more energy-efficient lamps will appear.