COB (Chip On Board) and SMD (Surface-Mounted Device) LED strips are both excellent lighting options, but they differ in construction, performance and best-fit applications. Here is a detailed comparison to help you choose.
COB vs SMD: At a Glance
COB LED Strips

Continuous light line · high uniformity · premium look · smoother beam.
SMD LED Strips

Individual light points · versatile · cost-effective · wide applications.
9 Key Differences Between COB and SMD LED Strips
LED Packaging Technology
COBMultiple LED chips are directly mounted and encapsulated on a single board with a protective layer — no individual packaging, giving a continuous light-emitting surface.
SMDIndividual LED packages are mounted on a flexible PCB. Each LED has its own casing and is spaced apart from the others.
Lighting Uniformity
COBMore uniform light spread — light comes from a continuous surface with no distinct gaps between LEDs.
SMDStill even, but slight gaps between individual LEDs can be noticeable on close inspection.
放熱
COBOften better heat dissipation thanks to the larger surface area of the board.
SMDIndividual LEDs may need more spacing between them for adequate heat dissipation in high-density applications.
Durability & Reliability
COBMore robust — fewer points of failure since there are no gaps between chips.
SMDReliable, but the higher number of individual LED units means a slightly higher chance of failure.
料金
COBMore expensive to produce, which often means a higher cost for consumers.
SMDGenerally more cost-effective due to the maturity and wide use of the technology.
応用
COBIdeal for smooth, uninterrupted light — backlighting for signage and general illumination.
SMDVersatile — from residential lighting to automotive and decorative lighting.
Maintenance & Repair
COBMore challenging to repair — replacing a single failed LED is not practical; the whole section may need replacing.
SMDEasier maintenance — individual LEDs can be replaced if they fail.
Aesthetics
COBAppears as one continuous line of light with no visible dots — a clean, premium look.
SMDIndividual light points are visible, which some designs intentionally use for effect.
Intensity & Angle
COBCan provide a wider beam angle and more intense light output thanks to the chip configuration.
SMDA more defined and sometimes narrower beam angle, depending on the LED package type.
結論
Choose COB for seamless, premium light lines — and SMD for versatility and value. Contact Lightstec if you need COB or SMD LED strips for your project.
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ジェリー・フーライトステックの創設者。工学の学位。 LED照明の分野で13年以上。 LED照明に関する知識とソリューションを共有します。
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