I know my MBA is LED and the profiler says the following. Yes it is very bright and I am usually running it at about 60%. It hasn't gotten any dimmer in the past month. [color:blue]<br>Chipset Model: GMA X3100<br> Type: Display<br> Bus: Built-In<br> VRAM (Total): 144 MB<br> Vendor: Intel (0x8086)<br> Device ID: 0x2a02<br> Revision ID: 0x0003<br> Displays:<br>Color LCD:<br> Display Type: LCD<br> Resolution: 1280 x 800 @ 61 Hz<br> Depth: 32-bit Color<br> Built-In: Yes<br> Core Image: Hardware Accelerated<br> Main Display: Yes<br> Mirror: Off<br> Online: Yes<br> Quartz Extreme: Supported<br></font color=blue><br><br>