Efficiency measurements of a few drivers

I ask for advice, I’m a noob in this business myself, but I know how to solder :slight_smile:

Can the d4k 12v 2A boost driver be converted to 6v 4A If so, what components need to be replaced on it? As far as I understand, reducing the voltage will not only allow you to work with the b35Am (I also have one substrate from Clemence), but will also increase efficiency?