The light sources of LED lighting products are relatively abundant. The 4 commonly-used light sources are LED, SMD, COB, and MCOB. When purchasing lighting products, how to choose a light source and what’s the difference between these four light sources?

LED module street light:

120W LED Street light

LED light source (LED refers to Light Emitting Diode) is a light-emitting diode light source. This light source has the advantages of small size, long life and high efficiency. LED light source is the most widely used in the field of lighting.

SMD street light

SMD (Abbreviation for Surface Mounted Devices) light source, surface mounted light emitting diode, has a large light-emitting angle, which can reach 120-160°. Compared with the early plug-in package, it has the characteristics of high efficiency, good precision, low false welding rate, light weight and small size.

COB street light

COB (Abbreviation for chip-on-board) light source is a high-efficiency integrated surface light source technology that directly attaches LED chips to a mirror metal substrate with high reflectivity. This technology eliminates the concept of brackets, no electroplating, no reflow soldering, and no patch process, so the process is reduced by nearly three points One, the cost is also saved by one third.

The COB light source has stable electrical properties, scientific and reasonable circuit design, optical design, and heat dissipation design, and adopts heat sink technology to ensure that the LED has an industry-leading thermal lumen maintenance rate. It is convenient for the secondary optical matching of the product and improves the lighting quality.

In addition, the cob light source is simple to install and easy to use, which reduces the difficulty of lamp design and saves lamp processing and subsequent maintenance costs.

Cob light sources are currently widely used in lighting fixtures such as light strips, spotlights, downlights, fluorescent lamps, and street lamps.

MCOB street light

MCOB, also known as Muilti Chips On Board, is a multi-faceted integrated packaging method. It is an extension of the COB packaging process. MCOB packaging directly places the chip in the optical cup, and coats phosphor powder on each single chip and completes the process. Dispensing and other processes. The LED chip light is concentrated inside the cup. To let more light run out, the more light-emitting ports, the higher the light efficiency. The efficiency of MCOB low-power chip packaging is generally higher than that of high-power chip packaging. s efficiency. It directly places the chip on the heat sink of the metal substrate, thereby shortening the heat dissipation path, reducing the thermal resistance, improving the heat dissipation effect, and effectively reducing the junction temperature of the light-emitting chip.