While both are applied in LED strip lighting, COB and SMD technologies differ in their design, performance characteristics, and areas of their application.
Let’s have a closer look at the fundamental technical aspects wherein these two types differ.
>> If you want to know more about our LED strip lights, check out this page: King Ornan’s LED Strip Lights
COB vs SMD LED Strip Lights: Key Technical Differences
LED Packaging and Density
The distinguishing factor of COB and SMD is that the LEDs are packaged. It is a Chip-on-Board where multiple LED chips are packed together onto a substrate or PCB. This allows high density, hence increasing the number of LED chips per unit area, with improved luminous flux and intensity.
On the contrary, SMD (Surface Mounted Device) LEDs are individually packaged and mounted in space on the PCB. A discrete SMD LED has an anode, cathode, and some even have ESD protection diodes and a current limiting resistor integrated into the small package. Some of the most common packages used in strip lights include 3528, 2835, 5050, and 5730 and numbers are the dimensions in millimeters.
Light Output and Efficiency
Generally, COB LED strip lights are much brighter than SMD strips concerning the lumen output of one watt. The reason is that because of the closer packing of the LED chips, more light could be emitted per unit area. In general, the luminous efficacy of COB strips falls in the range of 80-120 lumens/watt, while in SMD strips, the luminous efficacy lies in the range of 50-80 lumens/watt.
However, it is only fair to say that the actual output and performance differ with the quality of the LED chip, driver circuitry, thermal management, and optical design. Even high-quality SMD strips with newer LED packages and efficient drivers provide great luminous efficacy, though not on a par with COB average.
Beam Angle and Light Distribution
The other important difference between COB and SMD strips is related to the LED’s light-emitting angle. Normally, COB LEDs would have a wider beam angle, 120 degrees or more, because of their multi-chip design and application of a phosphor layer or diffuser over the chips. That means the light spread will be wider in the case of COB and ideal for applications where uniform illumination of a larger area is required.
SMD LEDs have a smaller beam angle of approximately 120 degrees or less. Because of this, the light from each individual LED package is focused into a more concentrated beam, thus creating a spotlight effect. Such characteristics make SMD strips appropriate for accent lighting, spotlighting, and where the light control is required precisely.
Color Rendering and Consistency
Another important consideration is color rendition, which is the degree to which the color of an object illuminated by a given light source appears as it would under natural outdoor daylight. Generally speaking, COB LED strips have a higher Color Rendering Index than SMD strips. Due to the multichip design and phosphor coating, COB LEDs can mix colors much better and provide a more balanced spectrum, hence giving improved color fidelity.
SMD LED strips are also capable of providing good color rendition, especially when high-quality LED chips with advanced phosphor formulations are used. Since the SMD LEDs are packaged individually, there may be slight variability of color consistency between the LEDs. This, in turn, may result in noticeable differences in color down the length of the strip, particularly on low-quality products.
Heat Generation and Management
It has already been explained that higher density in COB LED strips generates more heat than SMD. In such closely packed LED chips, heat is concentrated in a small area, which can raise the operating temperature of the strip. Proper heat dissipation is quite essential for maintaining performance and longevity in these COB strips.
The COB strips have to be effectively thermally managed, either by using aluminum PCBs or heat sinks with thermally conductive adhesives applied. Poor heat dissipation could lead to high temperatures that may cause degradation in luminous flux, color shift, and even pre-mature failure of LEDs.
With spaced-out LED packages, SMD LED strips intrinsically dissipate heat much better. Because more surface area and space are available to allow air to pass between packages, individual LEDs dissipate their heat more efficiently. In contrast, high-density SMD strips have a lot of LEDs and can generate significant heat that needs proper thermal management measures.
Cost and Customization
SMD LED strips are normally much cheaper in terms of budget compared to COB striping. Due to the individual packaging of SMD LEDs, their standardized manufacturing processes further contribute to a lower cost when produced. This makes various configurations greatly possible and quite reasonably priced, especially in many situations.
With a higher component density and since it’s manufactured in a special way, COB LED strips come out a bit more costly. Probably, some of the explanations for the price difference are a custom-designed PCB, quality LED chips, and an advanced packaging technique used in COB manufacturing.
Other differences between the two technologies involve customization options. The flexibility of cutting and reconnecting multiple strips gives an advantage in using SMD LED strips. This strip can easily be cut on its designated cut points, and one can reconnect using solderless connectors or soldering. This affords more flexibility for installation and customization of an application as it suits the given application requirements.
Application Suitability
Usually, the choice between COB and SMD LED strip lights depends on their intended application. Here is a general overview:
Overall Summary
To summarize, COB LED strip lights excel in those applications that require high brightness, uniform illumination, and wide-angle lighting with excellent color rendering. They are ideal for task lighting, general illumination, and situations that call for seamless shadow-free light distribution. However, they are a little more expensive than other strips, and proper thermal management should be considered to ensure optimal performance and longevity.
>>If you want to learn more about how to install LED strip lights, you can check out this article: Precautions for Installing LED Strip Lights.
King Ornan: Your Trusted LED Strip Light Supplier
At King Ornan, we understand that the right choice of LED strip light technology for your particular lighting requirements is paramount. Being one of the leading LED strip light suppliers, we have more than a decade of experience in offering a wide variety of high-quality COB and SMD LED strip lights for various applications and budgets.
Our professional lighting team will be able to help you with all your needs and provide professional guidance. We work closely with our clients to understand their exact requirements and suggest the most appropriate LED strip light solution, whether it is the high-brightness and uniform illumination of COB strips or the cost-effectiveness and flexibility of SMD strips.
Focusing on novelty, quality, and consumer satisfaction, King Ornan produces state-of-the-art products that will become real treasures for users with their excellent performance. Its large product line, technical capability, and personal attitude make King Ornan definitely one of the leading strip light producers.
Reach out today to discuss your LED strip lighting needs and find out how we can light up your projects using the power of COB and SMD technologies.
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