Question

why do we preffer to use coloured LED's in the traffic signal light then the light bulbs or flurosent bulbs​

Answer 1

Answer:

Long Life -

LED Lighting Features Long Operational Life Time Expectations

Energy Efficiency -

LED Lighting Features A Much Better Energy Efficiency

Ecologically Friendly -

LED Lighting Is Much More Eco-Friendly

Durable Quality -

LED Illumination Can Withstand Rough Conditions

Zero UV Emissions -

LED Lighting Features Close to No UV Emissions

Design Flexibility -

LED Lighting Has Powerful Flexible Design Features

Operational in Extremely Cold or Hot Temperatures

Light Dispersement -

LED Lights Achieve Higher Application Efficiency

Instant Lighting & Frequent Switching -

LEDs Can Be Turned On/Off Many Times

Low-Voltage -

LED Lighting Can Run on Low-Voltage Power Supply

Explanation:

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Answer 2

Answer:

It can be seen clearly from far.

Explanation:

LED's have better visibility than bulbs. The light from the bulbs usually spread over a distance and cannot be seen from far. But LEDs have sharp,focussed light rays which enables it to be seen from a huge distance.