Anna In the Dark Without a Clue

Anna Nicole Smith lost her appeal -- this time with the power company. TMZ has learned that the former Playboy playmate is living in the dark again -- and this time there's no light at the end of the tunnel.

As we first reported; last Monday, Ben Thompson, her former fling who owns the home, turned off the power after Anna refused to pay for staying there. Anna's lawyers went ballistic and the power company gave her a reprieve. But Ben meant business and the lights are now officially off.

We're told Anna is still inside the house, and it worked to her benefit. Get this. The police showed up yesterday to serve her with a second eviction notice -- and couldn't get in because the electric gate wouldn't budge!