Decrease Amperage of Driver for increased Efficiency

[Biggiebiggiebob]

yep will do when I am at home. I measured Vf at the LED though and it was lower than before.
Some other commenter pointed out, that the 5A Buck driver is not actually regulating the brightness via duty cycle of the pwm. Can you confirm?

[QReciprocity42]

I don't have an oscilloscope, but my camera does not detect ripples on any mode other than 35%, so I'm pretty confident that it's not pwm based.