1. Light Appearance

• COB: Seamless, dot-free continuous light — great for aesthetic and close-up lighting.

• SMD: Visible LED dots unless diffused — may look uneven in some setups.

2. Brightness

• COB: Softer light with moderate brightness.

• SMD: Higher peak brightness — better for task or outdoor lighting.

3. Flexibility

• COB: More bendable and compact — ideal for curves or tight spaces.

• SMD: Less flexible, especially with high-power versions.

4. Heat and Efficiency

• COB: Good efficiency but needs heat dissipation (e.g., aluminum channels).

• SMD: Better heat spread due to wider spacing between chips.

5. Cost

• COB: Generally more expensive but visually cleaner.

• SMD: Cheaper and more widely available.

6. Use Cases

• COB: Decorative, ambient, and premium installations.

• SMD: Task lighting, DIY projects, large spaces.

Bottom Line:

Go with COB for sleek, uniform light and flexible installs. Choose SMD for high brightness and lower cost.