We are very impressed with the picture quality of the TV (yes, ours actually works - so far).
However the people who built in this automatic dimming feature must have been high on something vicious.
Any time there is a night scene or dark picture background, the TV decides to dim the screen even more, making the picture impossible to see. This is totally idiotic and insidious.
There is no way to turn this feature off, whatever we tried.
Not recommended to buy.