Default screen brightness, T400

i am trying to setup default screen brightness to a specific level but all i found in the power manager tools (v 3.20) is dynamic brightness control which doesn't allow for the specific level of brightness. how should i resolve this issue? it would be nice if screenshots were provided.
thanks

You can put it wherever you feel comfortable.
I would recommend 1 step higher brightness than the least you are able to stand--this will give you a balance of battery life and comfortable viewing.

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