COB vs. SMD LEDs in Work Lights: Manufacturer Compares Beam Angle, Heat Dissipation, and Cost

Ningbo Mengting Outdoor Implement Co., LTD. has released a comparative analysis of Chip-on-Board (COB) and Surface-Mounted Device (SMD) LED technologies, commonly used in portable work lights. The company identifies the choice between these two as a critical specification for original equipment manufacturers (OEMs).

COB LEDs provide a wider beam angle, exceeding 120 degrees, and a uniform light output, making them suitable for broad illumination needs like construction sites and photography. They offer higher luminous efficacy, ranging from 80–120 lumens per watt, and generally a lower cost per lumen. However, their compact nature results in a higher heat flux density, requiring robust thermal management solutions.

SMD LEDs produce a narrower beam, typically between 90–120 degrees, which is advantageous for focused tasks and inspection lighting. While their efficacy is slightly lower, at 50–100 lumens per watt, and cost per lumen is higher, they offer a longer lifespan (50,000–70,000 hours to L70) and a more distributed heat dissipation pattern.

The company states that the decision hinges on three engineering trade-offs: beam pattern (flood versus spot), thermal management (high heat flux versus distributed), and color flexibility (fixed versus tunable). Ningbo Mengting has integrated both technologies into its product lines based on specific application requirements.