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COB light source means that the chip is directly bonded and packaged on the entire substrate. That is, N chips are integrated on the inner substrate for packaging, and the LED chip is directly attached to the mirror metal substrate or ceramic substrate with high reflectivity.
COB technology is mostly used in low-power chips are difficult to produce high-wattage LED lights. By dispersing the heat of the chip, COB technology can improve light efficiency and reduce glare. Thanks to its high luminous flux density, COB produces evenly distributed light with little to no glare.
Under the premise of the same wattage, COB light fixtures are generally less expensive than SMD light fixtures. The COB light source eliminates the need for a bracket during the production process, which also reduces costs.
The COB light source is a high-power integrated surface light source. The light emitting area and shape size of the light source can be designed according to the shape and structure of the product. In markets, the COB size mainly includes 11mm, 17mm, 20mm, 23mm, 32mm, 42mm, and 60mm for different wattages. The wattage is generally larger than 3 watts.
Our LED lights are designed for electrical stability, scientific and reasonable circuit design, optical design, and heat dissipation design.
The use of heat sink technology ensures that the LED has an industry-leading heat lumen maintenance rate (95%). The lifetime is longer than Hrs.
It is convenient for the secondary optical matching of the product and improves the lighting quality.
High color rendering, generally COB Chips RA more than 90.
Uniform luminescence, no spot, healthy, and environmentally friendly.
Simple installation, convenient use, reducing the difficulty of the lamp design, saving lamp production processing and subsequent maintenance costs.
SMD stands for Surface Mounted Devices. SMDs are components that are used in surface mount technology (SMT). With SMDs, there is only a single chip or a few chips on each light source.
The SMD light source emits divergent light. When forming an LED lamp, it is often used with a reflector. Generally, the power of a single light source is low.
This process is well-suited for high-power product creation with a large number of aluminum substrates. The currently available SMD LED chips are as follows:
Model/Types SMD LED SMD LED SMD LED Size 3.0*3.0*0.52mm 2.8×3.5×0.8mm 5.0*5.0*1.6mm Wattage 1Watt/pcs 0.2Watt/pcs is original. But right now, 0.5Watt/pcs and 1Watt/pcs are more and more 0.2Watt/pcs is original type, but now, mostly 3Watt-5Watt/pcs Voltage & Current 6.2V 150mA as standard, but 3.2V 300mA available 3.2V output voltage,60mA for 0.2W; 150mA for 0.5W, 300mA for 1Watt. 3.2V 60mA for 0.2W; Lumens Average 110-160lm/pcs, 200lm/pcs Max 24-36lm/pcs for 0.2W type; 55-70lm/pcs for 0.5W type; 110-140lm/pcs for 1W type. 24-28lm/pcs for 0.2Watt. 200lm/watt for 3-5Watt type. Famous brand(manufacturers) LUMINUS(Philips), Osram, Bridgelux Osram, EPISTAR, Bridgelux CREE, Bridgelux, PHILIPS Applications Street lighting, Flood lights, High- bay lights 0.2Watt type mainly for T8 LED Tube, bulb; 0.5Watt chips mainly for LED Panel lights, led downlights; 1Watt chip mainly for LED Flood lights, high bay lights, street lights etc. 0.2W Chips mainly for DC12V 24V low voltage led flexible strip light. The 3Watt-5watt SMD mainly for stadium floodlight, high power street lightsSMD: The LED chip is attached to the pad of the lamp bead holder with conductive glue and insulating glue, and then welded with the same conduction performance as the COB package. After passing the performance test, it is encapsulated with epoxy resin, then light is split, Cut, and taped, and transported to the screen factory and other processes.
COB: After the LED chip is soldered to the lamp bead on the PCB board, it is then tested for proper conductivity. If it meets the standards, it is then encapsulated with epoxy resin.
SMD: The light-emitting surface of the SMD LED chip is non-uniform, causing glare.
COB: COB LED downlights offer several advantages over their SMD counterparts. COB LEDs have a larger viewing angle and are easier to adjust. Additionally, COB LEDs produce no glare and have a uniform, round spots with no astigmatism or shadows. SMD LEDs, on the other hand, have bright spots in the middle of the light spot, halos on the outer edges, and uneven light spot transitions.
SMD: SMD packaging uses surface mount technology (SMT) to attach multiple discrete LED lamp beads to a PCB board to form a light source component for LED applications. It is a multi-point light source form.
COB: COB packaging is a high-efficiency integrated light source technology. It involves the placement of N chips on an inner substrate for packaging. Low-power chips are used to manufacture high-power LED chips, which results in a uniform small light-emitting surface.
The COB light source uses small chips that are densely arranged to generate large and concentrated heat. The packaging material absorbs the heat and superimposes the heat inside the lamp body. However, it has a low thermal resistance heat dissipation method of &#;chip-solid glue-aluminum&#;, which guarantees heat dissipation. The SMD light source is limited by the package, and the heat dissipation needs to go through the steps of &#;chip-bonding glue-solder-solder-copper foil-insulating layer-aluminum&#;, which results in slightly higher thermal resistance.
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But in the production of high-power lamps, SMD lamp beads are usually arranged and dispersed. This design provides a larger heat dissipation area and allows heat to conduct more easily. As a result, SMD lamps tend to have more stable temperatures than COB lamps, even during prolonged use. Therefore, for the temperature of the entire lamp, the general SMD solution is better than the COB solution.
Different types of light sources are better suited for different applications. For example, COB light sources are typically used in indoor lamps such as downlighters and spotlights, while SMD LED chips can be used in a wide variety of indoor and outdoor lamps. Each type of light source has its advantages and disadvantages, so it&#;s important to choose the right one for your needs.
As you may know, the color rendering index (CRI) of most SMD LED chips on the market is typically around 70-80. Some brands offer CRI90 options, such as Osram SMD. Most COB chips have a CRI above 90, even up to 97. This is also a good color rendering index. This is why indoor commercial lighting often chooses COB LED lamps for higher index requirements.
LED chips (also known as surface mounted diodes or SMDs) are all identified by a four-digit number. This code is less complicated than it looks &#; it simply indicates the size of the LED chip. For example, the dimensions of SMDs on LED strip lights are 5.0mm x 5.0mm.
LEDs like s, s, s and s aren&#;t really different types of chip at all &#; they&#;re simply different sizes. Each has its own spec: different power requirements and output brightness. The best choice depends on what&#;s right for your project.
You can find out more about each LED chip below.
Measuring 3.5mm x 2.8mm, the SMD is a smaller chip than the LED strip SMD. You will most often find chips on 12-volt LED strips, drawing 4.8 watts (also known as 4.8w p/m or 5w p/m LED tape) with 60 SMDs per metre.
These strip lights output around 330-360 lumens per metre, depending on colour (equivalent to a 40w halogen) &#; enough to produce a smooth, bright effect when shining onto any surface.
InStyle offer red, green, blue, amber, and both warm and cool white SMDs as standard colours. (We can also supply other white colour temperatures, made to order.)
60 SMD p/m LED strip lights are typically used for feature lighting &#; such as plinth or coving lights, in homes, bars, restaurants, hotels and other locations.
Though less common than standard 60 SMDs p/m LED tape, SMDs are also used on LED strip lights with 120 chips per metre. Pulling 9.6 watts (known as 9.6w p/m or 10w p/m LED tape), these tapes are available in the same range of colours. Light output is exactly double that of 60 SMDs p/m tape &#; they have twice as many LEDs &#; so that&#;s around 660-720 lumens per metre, depending on colour.
120 SMD p/m LED strips are used for the same kind of feature-lighting applications as its standard alternative. We recommend them for locations with strong ambient light, where more brightness is needed than the 4.8w p/m can produce.
The cut points for our 60 SMD-per-metre LED strips are 50mm apart. The 120 SMD p/m strips have cut points at 25mm intervals. Both types are also available in waterproofed versions (IP67-rated).
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