Since Halloween is coming up, the Skull Candles would make a pretty cool decorative piece to set the spooky mood in the home.
The Skull Candles will light up the home in a fairly grim matter -- but the environment will be brighter nonetheless. The item is made from 100% paraffin wax, which is shaped in the form of a skull with the wick attached from the top. It probably doesn't look scary when it's not lit; but once that wax melts, it'll definitely bring more of a creepy vibe that you're looking for. The Skull Candles comes in various sizes and it's also available in either black or white.
Whether it's because Halloween is coming up, or you're just into macabre themes, the Skull Candles would add a cool dark aesthetic to the home.