Which one is better, a COB LED grow light or an LED grow light bar?

COB, or Chip-on-Board, is the new LED technology. It has its name as the LED chips will be mounted onto the circuit board to create LED arrays. Because of the way COBs are built, COB LEDs reduce the components used and maximize the number of LED chips on the circuit

Most led grow light bar is SMD. the SMD LED light source is a single patch LED lamp bead with a light-emitting diode directly attached to the surface.

Integrated LED is usually a different name of cob led in the market, but in fact, it can not clearly describe the characteristics of cob led. Cob refers to the chip on board, which directly encapsulates the low-power chip on the aluminum substrate to realize rapid heat dissipation, small chip area, high heat dissipation efficiency and low driving current. Therefore, it has high heat dissipation, low thermal resistance and high thermal conductivity. Compared with ordinary SMD LED, it has higher brightness, lower thermal resistance (6 ℃ / W), lower light attenuation, higher apparent index, perfect light spot and longer service life.

The low-power LED of SMD is evenly arranged on the aluminum substrate, also known as integrated LED. In fact, this integration only solder SMD LED package (finished LED) on aluminum substrate (not cob LED; cob directly encapsulates low-power chip (LED chip) on aluminum substrate) All cob LEDs are integrated LEDs, but not all integrated LEDs are cobs.

SMD LED is a single bead patch LED lamp. Cob led integrates multiple SMD LED chips and is packaged into a whole. Compared with SMD LED with the same power, it has smaller size and higher brightness.

Pros of COB led grow light;

High Color Rendering Index

Long life span

Don’t need too much electricity

Easy to set up

But it also with some cons ;

Tendency to overheat

Quite expensive

If one of the COB beads is broken, the impact will be great, while if one of the SMD beads is broken, there will be no impact on the LED grow light

In End. It depends on what you are growing, how many plants you have growing, and the local availability of light. This also depends on fixtures, fixture placement, light distribution, and growing cycle.