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Aug 20,2023

Replacing inefficient MR16 halogen lamps with LEDs

  LED lighting can effectively save energy

  Today, lighting accounts for nearly one-fifth of the electricity consumption in the United States, and the vast majority still use inefficient (<5%) incandescent lamps. Promoting energy-saving lighting technology will greatly save electricity, reduce carbon dioxide emissions, and reduce the demand for new power plants.

  This is a light emitting diode developed using the principle of semiconductor PN junction luminescence.

  The entire structure is to connect the two ends of the semiconductor chip to a positive and negative power supply, and one end is connected to a bracket, and then it is packaged with epoxy resin.

  This structure can directly convert electrical energy into light, greatly improving energy utilization.

  LED lights can emit a variety of colors, including red, yellow, blue, green, cyan, orange, purple, and white, and the light emitted is mainly determined by the P-N material used.

  For example, aluminum gallium arsenide can emit red light, cadmium zinc selenide can emit green light, and aluminum gallium indium phosphide can emit yellow light.

  When diodes were first invented, they were only used as signal indicators. Soon after, it was discovered that the photoelectric effect of LEDs was stronger than that of incandescent lamps, and their brightness could also be higher.

  So it has gradually been applied to lighting systems and screens, making people's nighttime lives more clear.

  LED lights can save energy

  We must distinguish between energy conservation and electricity conservation.

  Firstly, under the same lighting conditions, LED lamps do consume less energy than incandescent lamps and energy-saving lamps, and under the same energy consumption, LED lamps will also be brighter.

  Taking street lamps as an example, if incandescent lamps are used, the power consumption is 140 watts. However, under the action of filters, the original 2000 streams of light will decrease by 90%, resulting in only 200 streams being usable.

  If LED lights are used and 18 are installed in the street lights, only 14 watts of electricity are needed to pass through the filter and achieve the same effect.

  Therefore, it is certain that LED lamps save more electricity than incandescent lamps.

  But we have overlooked one issue, which is that everyone's pursuit of brightness is greater than before, so most of the power of electric lights has also increased, and the electricity saved by LED lights has given it its power.

  Previously, incandescent lamps mainly used high temperatures to generate heat from the tungsten filament, thereby achieving the effect of emitting light.

  The current of an incandescent lamp ranges from 5 to 15 watts. Although it is low in cost and easy to manufacture, its photoelectric conversion rate is extremely low, only 2%.

  When the tungsten filament turns black, the light bulb should also be replaced, so the lifespan of an incandescent lamp is not very long.

  But LED lights can also emit light under low temperature conditions, and they won't become as hot as incandescent lights, so they are also safer.

  After replacing incandescent lights with LED lights, people's demand for light has gradually increased. Nowadays, every household can turn on their lights at night and open doors and windows to almost illuminate an area.

  There are many watts of LED lights, and they can even be combined according to needs. Nowadays, in the living room, 30-50 watts of LED lights are generally used, while in the bedroom, 15W is sufficient.

  You should know that in the past, installing a 40 watt incandescent lamp was like a wealthy local household, where the average household used a very small wattage, which saved electricity.

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