Energy consumption of raspberry pi connected led

General
1

Hi everyone.
I want to calculate the energy consumption of led which is connected with raspberry. Can anyone suggest to me, how can it be done?

2

Multiply the power of the led in Watts by the time it is on in hours and divide by 1000 to give kW hours.

3

Thanks for your kind reply, But how can I measure the time?

4

A quick search of the node red flows site found this which might be helpful

5

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