Downside of LED

LED life, range of colors, durable, small size and design flexibility, etc. " However, no matter how passionate we are for this green energy source, we have to face the truth that its energy efficiency advantage can cause problems..... .....

A Post from engadget said: A number of cold weather American states are reporting their dismay at finding out that LED traffic lights are so energy efficient that they do not produce enough excess heat to dissipate any snow that covers them. It turns out, perhaps in a homage to bad engineering everywhere, that the inefficiency of incandescent light bulbs was previously relied upon to keep traffic signals unimpeded. The new LEDs do not achieve the same effect, which has resulted in a few accidents and even a death being blamed on obstructed traffic lights.

Sorry for the people who encountered the traffic accidents and this indeed proved the old saying everything has two sides. And for designers, this is a reminder to consider variety circumstance including extreme conditions during design process.

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