There are several types of LED, operation and different performance. “Still a complication in the choice of an LED bulb”, you might say… It is nothing!
It’s actually not that complicated since each of these types of LED has advantages and disadvantages that determine to a particular use, according to your need or the location of your bulbs. It will then be easy to define what kind of LED direct you. Determine angles of spread and the power of your bulbs, where rather vice versa because it is your needs in terms of angle and power that will determine the most appropriate type.
The LED Dip, which is the oldest.
The first LED that you saw were probably of this type, these are the ones used since nearly 40 years in all your electrical devices / electronic as a light to inform you of the presence of a voltage, operation of the device or to a selection of program for example.
So, these are naturally the first to have been used and developed for lighting. They are reliable and very little costly but their performance is far from exceptional, particularly with respect to technologies that will follow. In addition, they have a very limited lighting angle that does not exceed 30 °. Besides you may already have the experience of a purchase of light bulbs made of this type of LED in large surface or another general distributor. You have seen that the power was not to go, very nowhere near your traditional bulbs.
A second generation of this type of LED appeared then. It is in fact a LED halfway between the first generation of LED DIP and the SMD LEDs (see below) because, if his appearance remains the same, it receives in his heart a wider light chips of the same component as the SMD LEDs. It allows to have a broadcast angle greater than that of the first generation, and a return (unfortunately) that significantly higher.
LEDs-shop made the choice to not market this type of led in its light bulbs. Although it may be appropriate in some cases and specific needs, too many people got the wrong idea about the LED due to the low performance of the LED DIP.
LEDs SMD (Surface Mounting Device).
This technology is completely different, more small and extra flat, it is welded on the surface of electronic circuits (where his name can be translated by component surface mounted). Although this technology has existed for many years, it has been possible to assemble and form blisters, as recently (on the order of a few years anyway). This type of LED produces barely more heat than the LED DIP which remains totally cold,
The SMD LEDs offered the best performance from the market until the appearance of the COB LED (see below). They happily exceed 80 lumens/watt led against only 30 or 50 Max lumens for a DIP LED. All for an equivalent consumption!
It also allows to obtain a light up to 140 ° angle, making it ultra versatile in its use.
Despite the appearance of more efficient LED lamps equipped with SMD LEDs remain the best price of the market because manufactured in very large volumes.
It is simply the most used LED currently in the world!
There are several type of SMD LEDs of sizes and so powers different because the surface of it, the more emitted brightness will be great, (a real rule in 90% of cases)
Based on applications and products, we use these different sizes, and one modulates the amount of these LED’s to get the luminous flux on a light bulb.
That’s why two bulbs that provide 330 lumens each will not necessarily have the same amount of SMD LEDs.
A LED bulb with 9 LED SMD can be more efficient than another with 60 LED SMD, because they do not use the same size of SMD LEDs.
You will find information on the size of the SMD LEDs used in the data sheets of the products:
SMD 3014, 3528 SMD, SMD 5050, 5060 SMD or SMD 5630. (there are others but very little used)
But what do these numbers mean?
In fact, they express the size of the so-called LED in tenth of a millimeter.
Example with the SMD5050 LED (the most common). It’s a square of 50 mm side dixeme led. (5x5mm)
The SMD LEDs can also manage the color differently. Indeed, according to its type, a single SMD LEDs can provide several colors when needed us several LED DIP for the same function.
This is why for example the 5050 SMD LED, are mainly used in led ribbons. In their version of the RGB (Red, Green, Blue or red, green, blue in French), they have 3 light chips of different colors, which allows a single LED to create from these 3 additive primary colors, 16 millions of colours that our eyes can perceive.
The High Power LED.
You were amazed by the performance of the SMD LEDs? The HIGH-POWER LEDs have a higher performance! But it also sometimes some drawbacks according to PiercingFlashlights.
The HIGH-POWER LED consist of a thorough basis of SMD LEDs up capabilities on which we add a lens that focuses the light output of the source.
This allows to obtain a higher yield than the SMD LEDs so light intensity (in lumens) superior too.
One of the main disadvantages of this LED is the lighting angle is greatly reduced. An average of 45 ° which corresponds to the average angle of type GU10 halogen bulbs. They are therefore used as mainly for light bulbs GU10 and MR16 (spots).
The second drawback is its price, slightly higher than a LED SMD bulb.
This type of LED product a little more heat than a LED SMD bulb. Nothing comparable to a light bulb filament, but depending on the application, take into account this element.
Finally, they are more sensitive to voltage changes and present interference in electric network.
Indeed, given that they are pushed to their maximum, we have more margin that protects the LEDs in the case of small surges. Unfortunately, in France, EDF does not stable voltage issue, and the High POwer LED do not really like that. Therefore, our range is gradually moving towards light bulbs LED COB (see below)
The COB LED.
It is a simple blend of several light chips (type SMD LEDs) arranged side by side to form a big LED.
The benefits are many and are so far the best-performing market LED!
Stability, reliability, durability, performance, the COB LED is the high-end of the LED.
Once reserved only for the needs of strong power (LED outdoor, industrial lighting projectors), the LED of COB is now present for our greatest pleasure in indoor LED bulbs. It’s gradually our range which, according to the needs, uses this type of bulb.
A COB LED product easily more than 100 lumens/watt. It resists changes in tension and has an intermediate angle of 80 ° making it the ideal LED for home use. However, it produces a little more heat than a SMD LEDs, but not as much as a High-Power LED.
However, some products require a passive cooling system when the LED is powerful.
The LED COB Filament (the latest).
The LED COB filament is the result of technology LED COB (principle of light Assembly of several chips) but in the form of filament (LED assembled along a single driver). A single filament brings together several LEDs, all being covered with silicon to create a constant and homogeneous light source along the filament. There are more to integrate several filaments in a simple glass bulb and… This is a LED light bulb filament.
The benefits are the same as the COB LED (best performance of the market today, reliability, stability).
It is perhaps more fragile (although it remains to be seen).
A LED COB Filament she also produces a little more 100 lumens/Watt. It resists changes in tension and has an intermediate angle of 360 ° (it is the only one to have this feature).
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