Quote Originally Posted by Demon View Post

Do a test, DC with varying voltage, adjust to desired brightness, measure current.

Repeat using PWM, adjust to similar brightness and measure current.

Robert
I did that. It's hard to tell if the brightness is different but that kind of answers my own question. For me it looks the same whether the current is 125mA DC or 360 mA DC. It's technically an AC sine wave, which would make sense given the fact that I measured 300mA AC, but I don't know for sure.

I know I have some photocells at home and that's about the best I can do to measure the amount of light.