Hello,
Firstly, calculating the wattage of the LED is
Electric power in a resistor circuit can be expressed as
P = U I
= R I2
= U2/ R (4)
where
P = electrical power (watts, W)
I = electrical current (ampere, A)
U = electrical potential difference, voltage (volts, V)
Eg: V = 121.45 V I = 6.029...