How do I install LED light strips inside my home?

So I want to put blue led lights behind my monitor so it can match my gaming pc. But what steps do I have to take to do so. I read online and I need a 12 volt adapter(no clue what that is). So far all I know is that I need the the LED light strips and the adapter but can someone make it clear what I need to do and... show more So I want to put blue led lights behind my monitor so it can match my gaming pc. But what steps do I have to take to do so. I read online and I need a 12 volt adapter(no clue what that is). So far all I know is that I need the the LED light strips and the adapter but can someone make it clear what I need to do and what I need to know. (Does the lights just plug into the adapter and that's it or what) Here's a link of the I'm planning on buying. (LED lights http://www.amazon.com/Hitlights-Flexible-Ribbon-Adapter-included/dp/B005GL55IU)
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