Advantages And Disadvantages Of LEDs

Aug 03, 2015

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. KEYOU PCB tells you a clear understanding advantage and disadvantage of LEDs. 

Advantages:
Energy efficient - LED’s are now capable of outputting 135 lumens/watt
Long Lifetime - 50,000 hours or more if properly engineered
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
No warm-up period - LED’s light instantly – in nanoseconds
Not affected by cold temperatures - LED’s “like” low temperatures and will startup even in subzero weather
Directional - With LED’s you can direct the light where you want it, thus no light is wasted
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
Environmentally friendly - LED’s contain no mercury or other hazardous substances
Controllable - LED’s can be controlled for brightness and color

Disadvantages:
-May be unreliable in outside applications with great variations in summer/winter temperatures, more work is being done now to solve this problem
-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
-Printed circuit board solder and thin copper connections crack when flexed and cause sections of arrays to go out
-Rare earth metals used in LEDs are subject to price control monopolies by certain nations 
-Reduced lumen output over time

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