MBP in closed clamshell (display closed) mode with an external display

I want to use my Macbook Pro Unibody in closed clamshell (display closed) mode with an external display
And I want to know if, the heat will damage the lcd of m macbookpro.
I want to buy a holder
http://twelvesouth.com/products/bookarc/
but i still have doubts about it the temperature and the Screen.
Thanks..

Apple says closed clamshell mode is a valid way to operate a Mac notebook, so that should be assurance enough. I don't know where the notion comes from that non-operating LCD screens can be damaged by heat. It would take a lot of heat to do damage. Way more than can be supplied by the computer itself.

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