Even though you said you decided on one, I want to say that last I checked, there were three different styles of LED. One is edge-lit, which is essentially the same type of backlighting as a normal LCD TV in that the screen is either backlit, or it isn't. The next level has like 9 sections of LEDs behind the LCD screen and each section can turn on and off independently of each other. This allows for better contrast than a universal backlight. The last is broken down into even smaller sections of LEDs. I forget the exact rows and columns, but this one is the most expensive.