SMD stands for Surface Mounted Diode. In simple terms, this is the LED diodes / chips that are fixed to the flat surface of the bulb. One characteristic of this type of bulb is that you will get a wider beam angle than traditional bulb types, which is more desirable.
What is 3528?
3528 refers to a type of chip. This chip has been in production for quite some time and it actually is the size of the chip that is 3.5mm by 2.8mm.
What is 5050?
5050 is the type of chip used in a SMD bulb. This chip is widely used and the size of this chip is 5.0mm by 5.0mm
What is 6060?
6060 is the newest type of chip that has just been launched. This chip is 6.0mm by 6.0mm
What SMD chips are used in our LED bulbs?
We use different chips in different bulbs in order to have a range of different prices and light outputs. The chips are the same technology but just different sizes. You would need around twice the number of 3528 chips to produce the same amount of light as a 6060 chip.