Why do everyone choose LED spotlights? What's so good about it?
The so-called LED spotlight actually refers to the spotlight that uses light-emitting diodes as the light source. The difference between this new type of LED spotlight and the traditional spotlight is reflected in the light-emitting principle and energy saving and environmental protection. Traditional spotlights generally use halogen lamps, so its luminous efficiency is very low, and it also consumes a lot of electricity, not only the energy saving effect is not good, but the service life is also very short. The new LED spotlights that are commonly used now have many advantages and are widely favored by people.
1 Strong energy saving:
The biggest feature of LED spotlights is that it is highly energy-saving. Because the spectrum of LED spotlights is almost all concentrated in the frequency band of visible light, its luminous efficiency is relatively high, so it has a very good energy-saving effect.
2. Good environmental protection:
Because the LED spotlight does not add mercury in the production process, and does not need to add gas, it is more environmentally friendly. At the same time, the LED spotlight does not need a glass shell, and its impact resistance and shock resistance are also relatively good, which is easy to transport, very environmentally friendly, and is called "green energy".
3 Lower prices:
The price of LED spotlights is relatively low among lamps, which is very popular and can be accepted and used by more consumers.
4 Low requirements for use environment:
Because LED spotlights use low-voltage direct current, they have the advantages of small load and weak interference, and the requirements for the use environment are very low. Consumers do not need to worry too much about the requirements of the use environment when choosing to use.
5 Faster response time:
The response time of LED spotlights is relatively fast, which can reach the level of microsecond switching. In the process of use, as long as the switch is turned off, the brightness of the spotlight bulb will disappear immediately, and there will be no delay or flickering phenomenon.
6 Long service life:
The service life of LED spotlights is relatively long, and can generally be used for about 50,000-100,000 hours. And such LED is a semiconductor device, even if it is frequently turned on and off, it will not affect its service life.
7 High light concentration:
The light of LED spotlights is generally concentrated in a small wavelength window, so the concentration of light energy it emits is very high, and the purity is relatively high.
In fact, the characteristics of LED spotlights are far more than the above. Because of its many advantages, it is widely promoted and used by everyone.
Looking back at the evolution of LED spotlights, we will hear such a statement: the first, second, and third generations of LED spotlights, and some people even call them grandpa, father, and grandson. The "third generation" came out much later than the "first generation". There is a saying that one generation is stronger than the first, but is the "third generation" necessarily stronger than the "first generation"?
The first generation of LED spotlights
The earliest LED spotlights, let's call it the first generation for the time being, did not integrate the whole lamp at that time, but just replaced the previous traditional light sources with LED light sources, and sometimes drivers or rectifiers may also be replaced.
Second generation LED spotlight
At the beginning of the second generation, the LED was installed into the lamp to form an integrated lamp, but most of the light sources used a single Hight Power. At this time, the technology of the LED chip is a bit more advanced than the earlier one, and it can be integrated. come together.
There are generally two types of optical solutions for second-generation spotlights, one is an integrated lens, and the other is a combination of many single lenses.
▲This type of lamp with many lamp beads adopts an integrated lens design, we call it a shower head.
The third generation LED spotlight
In the third generation, in recent years, a large number of LED spotlights with COB light sources have appeared. It can integrate relatively large power requirements on a very small chip, achieve higher power in a small area, and generate higher lumen values, so it has gradually become the most mainstream LED emitter for modern commercial lighting. lamp.
The optical design of COB spotlights has also undergone several changes:
1 pure reflector type
The first type, the pure reflector type: a COB inside and a reflector outside. Its problem is that the light directly out of the COB has a strong secondary spot, and the spot is not very beautiful, and then there is an improved COB spotlight.
2 reflectors + light guide column type
▲The improved COB spotlight is shown in the picture above, with reflector + light guide.
3 lens type
Now the third type is used more - the lens type. A relatively large lens is added to the COB. The lens is directly placed on the COB light source, and the spot effect is very good. This is a more mainstream way now. .
▲The structure of the lens type LED track light head is disassembled.
Of course, each of these optical methods has its own characteristics and advantages.
▲For example, the reflector-type LED spotlight has a relatively high light output efficiency, but the transition of the light spot is not very good.
▲Adding a light guide column or completely using a lens can make the light spot more beautiful.
Advantages of the latest COB spotlights
First of all, its power range is particularly large: as small as 3W/5W, as large as 25W/35W, it can be used in restaurants, homes, and commercial lighting.
Secondly, the color temperature range is very wide, from a very low 2200K/2400K to a very high 6000K/6500K, breaking the color temperature limitation of metal halide lamps of only 3000K to 4000K. The previous Hight Power color temperature can also be selected in multiple ways, but the technical requirements for packaging are relatively high, so high-power lamp beads are limited to a few manufacturers, while the packaging technology requirements of COB are slightly wider.
Therefore, the packaged COB can make a variety of light colors, and there are multiple color points under the same light color, which can meet the needs of more subdivided fields.
The improvement of packaging technology has also generally improved the color rendering of COB, and a good COB can reach a CRI of 98.
Three generations must be better than one?
Looking back, we mentioned the first, second, and third generation spotlights. It must be emphasized that it cannot be said that "this" must be better than "that". The products used, even the first generation products a long time ago, still exist in the market and even sell very well.
We say that the first generation, the second generation and the third generation are only divided according to the time of appearance. It does not mean that the third generation is necessarily better than the first generation.
For example, the lamp bead of Hight Power is only a light-emitting point, and a single lamp bead can be made into a very narrow beam angle, while COB has a light-emitting surface, although through a large lens, it can also achieve a very narrow beam angle, But in the early days, the effect of the spot is not as good as that of the single lens.
These types of LED track spotlights have their own advantages and disadvantages. There is no such thing as who derives who, and they have their own advantages and disadvantages in different eras and application places.
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