light bulbs

I am working on lighting this year to maximize the effect of my haunt. I wanted to turn my house a rich blue (uplighting) as I have seen in other posts. . Does any one know what type of led lights would work best? I am assuming that LED floodlights pointed at my house would work for the effect...

I am thinking for my Halloween party this year I want to have an insane asylum theme, and was wondering if anyone knew how do get that creepy dull light bulb flickering effect. I was thinking of running a string of them down my narrow livingroom.