Don't say that LEDs are energy-efficient, really, because it's not fair to LEDs.
We usually divide the light source technology into three generations: the first generation of heat radiation source, the second generation of gas discharge source, and the third generation of solid state light source, which is LED.
From incandescent lamps to CFLs, there is no doubt that there is significant energy savings.
But now we can say that LEDs are several times more energy efficient than fluorescent lamps and metal halide lamps? It seems that no one dares to say this, as if selling LEDs is still more energy-consuming than halogen lamps. Even so, even if it is not energy efficient, LED is still revolutionary.
The simplest, probably the earliest, and now the biggest cabbage in China, is the LED light strip. We take the product parameters of a Japanese brand as an example (Taobao explosions, highlights, super bright, super bright, 5 yuan, one meter, one meter, one meter, one thing, we don’t care anymore), 10W LED strips per meter, light effect About 60lm/w, this is not comparable to straight tube fluorescent lamps. However, after being associated with the application scenario, it is obvious that the current hotel ceiling light trough will not be equipped with straight tube fluorescent lamps or cold cathode tubes, all of which are LED lights.
Probably no one would say this: "Hey, your LED light has no luminous efficiency, no fluorescent light, not enough energy, so I don't buy it." Because LED is a directional 120° light, in this scenario, we It will be found that a part of the so-called high-efficiency light of the 360° light of the straight tube fluorescent lamp is actually wasted, and the LED light strip can replace the straight tube fluorescent lamp with a lower power and less energy-saving light effect number.
Of course, in addition to the application environment in the ceiling light trough, LED strips have more advantages: flexible bendable, splicing, cutting, color, etc. These are nightmares for fluorescent lamps.
120° luminescence is one of the main characteristics of LEDs. It is also very useful in functional luminaires, in addition to the help of partial decorative LED strips.
For example, we want to get an ultra-narrow beam angle. If you use a halogen lamp bead (of course, the nonsense fluorescent lamp can't do it...), you need to calculate a parabolic reflector surface, grab the light from the lamp to the reflector, and turn it into parallel light. At the same time, it is necessary to cover the light in the outward direction of the lamp bead to avoid affecting the light distribution curve (refer to the structure of QR111, the principle of metal halide lamp is the same).
With the LED light source, all the optical paths can be designed in the TIR lens, and the final structure is simple and the size is smaller (of course, the TIR is still very complicated...). These are not related to "energy saving", but ultimately they are very helpful in the installation and use of finished lamps and application scenarios.
In addition, compared with downlights and spotlights using metal halide lamps, LED lamps have higher optical system efficiency, beam efficiency, intelligent regulation, instant start, color and other advantages, as well as color rendering performance. In terms of color rendering performance, according to the current Ra, Ri system, the color rendering index of the LED can exceed the metal halide lamp, close to the halogen lamp, and his potential is almost no upper limit.
There is an article in the micro-classroom that introduces some innovations in the color performance of LED light sources in commercial store lighting. We can make an extreme assumption. If an LED track spotlight can better express the color of clothing or food, but it costs 5W more than a 35W metal halide lamp. Is this related?
In addition to the properties of beam angle and light color, the small size of the LED is also a big advantage. For example, in the jewellery showcase, the pole luminaire, which used to be a pole with MR16, can now be replaced with a small-sized LED, and the luminaire is only 3.5mm wide. As for the power, it is not too important to reduce from halogen 20W to LED10W, 8W, or 4W, 2W.
If the application scenarios listed above are all LEDs are replacing traditional light sources. So what better reflects the characteristics of LED luminaires, perhaps those that have been newly developed because of LEDs, such as building facade lighting.
At the beginning, we replaced the original gold halide floodlights with spotlights using LED light sources. Later, we found that LEDs and metal halide lamps are not the same, and the size can be small enough. We can install LED lamps directly in the building. Surface structure. If it is more energy-consuming, it may be that the lighting system is more energy-efficient, but the effect is completely different. Therefore, most of the skyscrapers currently covered are using such a building facade lighting system that the overall energy consumption may be larger, but the effect is different, and only LEDs can be completed.
Finally, in addition to these lighting properties, the most essential difference between LEDs and traditional light sources is that they are diodes and are an electronic device. LED lighting equipment will eventually become a digital product. The intelligent regulation of LEDs will be far from what we now say, phase-cut dimming, 1-10v dimming, DALI dimming, etc., but you can’t imagine What will it be?
So, don't say that LEDs are energy efficient. LEDs are not used to save energy, but to revolutionize.
We usually divide the light source technology into three generations: the first generation of heat radiation source, the second generation of gas discharge source, and the third generation of solid state light source, which is LED.
From incandescent lamps to CFLs, there is no doubt that there is significant energy savings.
But now we can say that LEDs are several times more energy efficient than fluorescent lamps and metal halide lamps? It seems that no one dares to say this, as if selling LEDs is still more energy-consuming than halogen lamps. Even so, even if it is not energy efficient, LED is still revolutionary.
The simplest, probably the earliest, and now the biggest cabbage in China, is the LED light strip. We take the product parameters of a Japanese brand as an example (Taobao explosions, highlights, super bright, super bright, 5 yuan, one meter, one meter, one meter, one thing, we don’t care anymore), 10W LED strips per meter, light effect About 60lm/w, this is not comparable to straight tube fluorescent lamps. However, after being associated with the application scenario, it is obvious that the current hotel ceiling light trough will not be equipped with straight tube fluorescent lamps or cold cathode tubes, all of which are LED lights.
Probably no one would say this: "Hey, your LED light has no luminous efficiency, no fluorescent light, not enough energy, so I don't buy it." Because LED is a directional 120° light, in this scenario, we It will be found that a part of the so-called high-efficiency light of the 360° light of the straight tube fluorescent lamp is actually wasted, and the LED light strip can replace the straight tube fluorescent lamp with a lower power and less energy-saving light effect number.
Of course, in addition to the application environment in the ceiling light trough, LED strips have more advantages: flexible bendable, splicing, cutting, color, etc. These are nightmares for fluorescent lamps.
120° luminescence is one of the main characteristics of LEDs. It is also very useful in functional luminaires, in addition to the help of partial decorative LED strips.
For example, we want to get an ultra-narrow beam angle. If you use a halogen lamp bead (of course, the nonsense fluorescent lamp can't do it...), you need to calculate a parabolic reflector surface, grab the light from the lamp to the reflector, and turn it into parallel light. At the same time, it is necessary to cover the light in the outward direction of the lamp bead to avoid affecting the light distribution curve (refer to the structure of QR111, the principle of metal halide lamp is the same).
With the LED light source, all the optical paths can be designed in the TIR lens, and the final structure is simple and the size is smaller (of course, the TIR is still very complicated...). These are not related to "energy saving", but ultimately they are very helpful in the installation and use of finished lamps and application scenarios.
In addition, compared with downlights and spotlights using metal halide lamps, LED lamps have higher optical system efficiency, beam efficiency, intelligent regulation, instant start, color and other advantages, as well as color rendering performance. In terms of color rendering performance, according to the current Ra, Ri system, the color rendering index of the LED can exceed the metal halide lamp, close to the halogen lamp, and his potential is almost no upper limit.
There is an article in the micro-classroom that introduces some innovations in the color performance of LED light sources in commercial store lighting. We can make an extreme assumption. If an LED track spotlight can better express the color of clothing or food, but it costs 5W more than a 35W metal halide lamp. Is this related?
In addition to the properties of beam angle and light color, the small size of the LED is also a big advantage. For example, in the jewellery showcase, the pole luminaire, which used to be a pole with MR16, can now be replaced with a small-sized LED, and the luminaire is only 3.5mm wide. As for the power, it is not too important to reduce from halogen 20W to LED10W, 8W, or 4W, 2W.
If the application scenarios listed above are all LEDs are replacing traditional light sources. So what better reflects the characteristics of LED luminaires, perhaps those that have been newly developed because of LEDs, such as building facade lighting.
At the beginning, we replaced the original gold halide floodlights with spotlights using LED light sources. Later, we found that LEDs and metal halide lamps are not the same, and the size can be small enough. We can install LED lamps directly in the building. Surface structure. If it is more energy-consuming, it may be that the lighting system is more energy-efficient, but the effect is completely different. Therefore, most of the skyscrapers currently covered are using such a building facade lighting system that the overall energy consumption may be larger, but the effect is different, and only LEDs can be completed.
Finally, in addition to these lighting properties, the most essential difference between LEDs and traditional light sources is that they are diodes and are an electronic device. LED lighting equipment will eventually become a digital product. The intelligent regulation of LEDs will be far from what we now say, phase-cut dimming, 1-10v dimming, DALI dimming, etc., but you can’t imagine What will it be?
So, don't say that LEDs are energy efficient. LEDs are not used to save energy, but to revolutionize.
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