Thought I would give my results on how backlighting works on my IPP 12.9 MK black vs white. Since I had some time on my hands I decided to run a comparison test. With average room lighting on my desk The black MK would always show about 1/4 lighting on the scale bar while the white keyboard would alway go to 0. While in coffee shop or outside both always went to 0 as expected. Seems like they are calibrated different but both work good. The white keyboard just works more like I expected. Anyone else done a side by side test?