Hi Sean,
I used it pretty extensively-- I'd say the screen has about 15,000 hours on it. That's why I'm wondering if using a blacked-out desktop would help; i.e., does the brightness of LEDs decline over time, or is the brightness decline due to a fading backlight? And does a backlight fade over time or, like a lightbulb, just keep burning at the same intensity until it "conks out" one day?