COB LED vs SMD LED

02/08/2017

Overtime, LEDs have become the preferred choice of majority around the world. In fact, according to statistics LEDs account for 20% of indoor lighting and more than 40% of outdoor lighting in Germany. The advancement in LED technology has led to the invention of an array of LED types from DIPs to SMDs and COBs. Resultantly, we are now provided with a number of LED options to choose from.

Surface Mounted Devices or SMDs have LEDs directly attached to the printed circuit boards. A printed circuit board or PCB is an electric structural entity which carries various chips and electronic components connected together. The direct placement of LED on PCB results in less occupied space and efficient thermal connection. In fact, the advanced latest developments in SMDs have made them a reasonable replacement for incandescent bulbs and mercury-based lighting.

The competent design of an SMD LED has resulted in better heat dispersion with high lumen output. The SMDs have single-handedly abled the manufacturers to mechanise LED production along with improved quality control.

SMDs are easier to maintain in comparison with other LEDs and have a longer life.

Chip-on-Board or COB LEDs, as opposed to SMDs are segmented into numerous tiny pieces of semi-conductor crystals and are directly placed over a substrate. COBs are popular for their heat efficient behaviour. They ensure minimum heat production and emit homogeneous light. The behaviour is enhanced with the addition of a ceramic substrate which induces a cooling effect in addition to the homogeneous light production.COBs’ assembling is relatively cheap and the LEDs have a longer life span.

Where SMDs demand a low maintenance cost, COBs have a low production cost. However, both being energy efficient, COBs produce better results with respect to heat emission. Where SMDs alleviate heat dispersion, COBs minimises the heat output altogether. Both the types of LED lights have a long life span and generally speaking both can prove to be of advantage in differing circumstances.

However, where both SMDs and COBs fail is in terms of shape and design. Till now they have been unable to imitate the exterior design of a conventional incandescent bulb. But with the advancement in LED technology, there now is available the LED filament bulb. The LED filament bulb successfully structures itself around the conventional shape of a regular bulb while being energy efficient and having longer life span.

Choosing the adequate LED comes down to individual preferences. While many would opt for the light packing of SMDs, other might go for COBs for their homogeneous light emitting behaviour. Rest might opt for LED filament bulbs for their conventional bulb like structure.There is no clear generalised preference and the choice of an LED differs from person to person.