brightness will vary depending on make and model of TV. My LG Automatically gets noticeably brighter when put into 3D viewing. Avatar was the Best 3D movie YTD in my opinion. In addition if you have any problems with loss of detail in 3d clarity i have noticed just by toying around if you double up your passive lenses the 3d becomes more crisp. Different set of glasses have different thickness of lenses. This does make a difference in passive viewing experience. All in all...