Looks like the 55 watt ballast is the way to go if I want to significantly increase brightness.Should be identical to this for removing the lower
Going to 4300ish is supposed to have the most output.
Results like this are going to vary from brand to brand, but this at least shows someone testing the lux output of 35 w on a bunch of bulbs and 55 w lux as well. It could give you at least a general idea, granted it looks like he’s just overpowering 35w bulbs in this on 55w ballasts.
why did you need to take off the tachometer? i thought it was fine if you just run it through the firewall to the fuse box?