LED Retrofit lamp - Power Factor

[steve30]

I just bought a Philips CorePro 5W LED GU10 lamp. Seems quite nice.

But it has a rated power factor of 0.5. Its rated current is 40mA, at 240V.

This 40mA multiplied by 240V (ish) is approx 9.6W. Now, I'm wondering two things:

1) Is the 5W just the LED power and the other few Watts the loss in the driver?
or 2), Is the 5W the true power, and the approx 9.6W the apparent power? Because (5W/0.5 = 10W).

I'll try and do a bit of measuring later on and see what I get.

Thanks
steve30

[qno]

With AC one cannot simply multiply Voltage and current.

It is V x I x cos (fi)

To accurately determine  the power you need to know the phase relation between the current and the voltage.