Question

why LED is more efficient than electric bulb?

Answer 1

Yes, both LED and CFL are much more efficient than incandescent bulb with the same output in lumens (lightoutput units). They will use 1/4 or lessof the power. LED is a little more efficient than CFL. It also turns on, full brightness, immediately; CFL gives annoying partial brightness for a minute or two

Answer 2

because it consumes and wastes less energy than electric bulb.
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