LED lighting-disadvantage and advantage

LED is the biggest thing in light since electric light was invented. Currently the LED lamp is popular due to it's efficiency and many believe it is a 'new' technology. As we know, the LED has been around for over 50 years. The recent development of white LEDs is what has brought it into the public eye as a replacement for other white light sources. LED lights are the sustainable choice, and the smart, functional choice. Shenzhen SysPCB tells you a clear understanding advantage and disadvantage of LEDs.

Disadvantages:
1. May be unreliable in outside applications with great variations in temperature, more work is being done now to solve this problem
2. Semiconductors are sensitive to being damaged by heat, so large heat sinks must be employed to keep powerful arrays cool, sometimes a fan is required. This adds to cost and a fan greatly reduces the energy efficient advantage of LEDs, it is also prone to failure which leads to unit failure
3. Rare earth metals used in LEDs are subject to price control monopolies by certain nations.
4. Expensive, big heat emission, power supply section is a main defect of LED lamp life, mainly because capacitor life in the power supply section is not long.

Advantages:
1. Energy efficient - LED' s are now capable of outputting 135 lumens/watt
2. Long Lifetime - 50,000 hours or more if properly engineered
3. Rugged - LED' s are also called "Solid State Lighting (SSL)" as they are made of solid material with no filament or tube or bulb to break
4. No warm-up period - LED' s light instantly – in nanoseconds
5. Not affected by cold temperatures - LED' s "like" low temperatures and will startup even in subzero weather
6. Directional - With LED' s you can direct the light where you want it, thus no light is wasted
7. Excellent Color Rendering - LED' s do not wash out colors like other light sources such as fluorescents, making them perfect for displays and retail applications
8. Environmentally friendly - LED' s contain no mercury or other hazardous substances
9. Controllable - LED' s can be controlled for brightness and color