LED Light Bulb

130 years ago, Thomas Edison invented the first successful incandescent light bulb. From then on, this light has lit the world. This is about to change. LED light bulbs, the frontier science of semiconductor-based lighting that will ultimately replace Edison's bulbs with its good performance on energy-saving. Most industry insiders believe that LED lighting will eventually replace almost all of incandescent and fluorescent lights in use around the world today. In the following article, I will talk about the differences between incandescent bulb and LED light bulbs from the structure.
Different incandescent light bulb type has different size and wattages, all of them have the three basic parts: the bulb, the filament, and the base. The filament is made of tungsten. The tungsten filaments can endure over the temperature of 2482℃. But the tungsten is very fragile, and very easy to burn out. So shorten the lifespan greatly. The bulb is made of glass. A standardized base is known as the "Edison screw base." Aluminum is used on the outside and glass used to insulate the inside of the base.
While an LED light bulbs consist of four essential components: an LED circuit board, a heat-sink, a power supply, and a shell. The LED lights imbedded in boards (PCB) and high luminance LED elements. Instead of the embedded filaments with fiber glass, the circuit board is laid out on a thin sheet of aluminum which acts as a heat-sink. Solder paste is then applied in the right places and then Surface Mount Technology (SMT) machines place the tiny LED elements, driver ICs, and other components onto the board at ultra high speeds. Because of no filaments, the lifespan of LED light bulbs is much longer than the conventional incandescent bulbs.