Physics, 29.08.2019 23:30, edjiejwi

An individual white led (light-emitting diode) has anefficiency of 20% and uses 1.0 w of electric power.
a) how many leds must be combined into one light sourceto give a total of 1.6 w of visible-light output (comparableto the light output of a 40 w incandescent bulb)?
b) what total power is necessary to run this led lightsource?

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An individual white led (light-emitting diode) has anefficiency of 20% and uses 1.0 w of electric po...