"SMD LED" is an abbreviation for Surface-Mounted-Device Light-Emitting Diode. An SMD LED is a type of LED that uses Surface-mount technology (SMT) to mount LED chips on printed circuit boards (PCB). It is a self-contained Surface-Mount LED device designed either to function on its own or to plug into a compatible unit.

Other types of LED lighting that are not SMD are the newer and more powerful luminescence COB (chip on board) and MCOB (multi-COB), finally, there are the older DIP LEDS, "Dual In-Line Package", DIP LED providing only low luminescence.

The types of SMD LED are distinguished by the dimensions of the LED package. For example, 5050 LED Chips are in 5.0mm*5.0mm. Common types are 5050 SMD LED, 3528 SMD LED, 5630 SMD LED. The brightness may vary depending on the input voltage inversely affecting the device's lifespan.

LED


SMD LED
(module)
Dimensions
(mm x mm)
Power
(watt)
Flux
(lumen)
CRI
(Ra)
Intensity
(candela)
Beam angle
(degree)
Heatsink
(yes/no)
Efficacy (min)
(lm/W)
Efficacy (max)
(lm/W)
8520 8.5 x 2.0 0.5 & 1 55-60 80       110 120
7020 7.0 x 2.0 0.5 & 1 40-55 75-85       80 110
7014 7.0 x 1.4 0.5 & 1 35-50 70-80       70 100
5736 5.7 x 3.6 0.5 40-55 80 15-18 120 no 80 110
5733 5.7 x 3.3 0.5 35-50 80 15-18 120 no 70 100
5730 5.7 x 3.0 0.5 30-45 75 15-18 120 no 60 90
5630 5.6 x 3.0 0.5 30-45 70 18.4 120 no 60 90
5050 5.0 x 5.0 0.24 14-18 60-70 5.1-5.75 120 no 58 75
4014 4.0 x 1.4 0.2 22-32 75-85       110 160
3535 3.5 x 3.5 0.5 35-42 75-80       70 84
3528 (aka 1210) 3.5 x 2.8 0.06-0.08 4 - 8 60-70 3 120 no 70 100
3258 3.2 x 5.8                
3030 3.0 x 3.0 0.9 110-120         120 130
3020 3.0 x 2.0 0.06 5.4   2.5 120 no 80 90
3014 3.0 x 1.4 0.1 9 - 12 75-85 2.1-3.5 120 yes 90 120
2835 2.8 x 3.5 0.2 14-25 75-85 8.4-9.1 120 yes 70 125
1206 3.2 x 1.6   3 - 6 55-60          
1104 1.1 x 0.4              

*data are for refernce only.


References

Wikipedia, SMD LED Module