Here's why Chad didn't use the panel in high brightness.
Panel brightness low raises the black level and seriously degrades contrast ratio, so I tried calibrating the VT60 in panel brightness mid and finally in high. As in the 30 and 50 series, panel brightness mid is the best choice for an accurate image. It allows a moderately bright image that is adequate for up to a normal family room ambient light level. However, some viewers may prefer a brighter image, so I attempted to calibrate a Day mode with panel brightness set to high. High allows about a 33% boost in light output, though it causes serious white crush at and above 95% at any contrast setting that gives a light output above about 26 fL. The white crush in PB high was visible with real images, so I consider both PB high and low seriously flawed at this time. However, in 3D mode PB high does not crush white and is perfectly usable.
Chad was able to achieve 43 fl for ISF day.