Nope. It's a programmatic change which raises the drive voltage levels. You can still calibrate an input level of black to output the darkest value the screen will display. Only after 1500 hours that lowest level is higher than before. Basically, the minimum brightness level rises, and there's no control turn it below that point.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris