Question

what is LED? how it is useful​

Answer 1

Answer:

An LED is a light emitting diode.

Explanation:

this uses a lot of electricity , but when it goes bad it is useless.

the advantages of LED lights are fairly obvious

hope this helps mate ....

and good night..

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Answer 2

Answer:

an LED is lightning device bro which give us light with the savings of electric bill of 70%