A jack-o'-lantern (or jack o'lantern) is a carved pumpkin, or turnip, associated with the holiday of Halloween and named after the phenomenon of strange light flickering over peat bogs, called will-o'-the-wisp or jack-o'-lantern. In a jack-o'-lantern, the top is cut off to form a lid and the inside flesh then scooped out; an image, usually a monstrous or comical face, is carved out of the pumpkin's rind to expose the hollow interior. To create the lantern effect, a light source (such as a candle or tea light) is placed within before the lid is closed. This is traditionally a flame or electric candle, though pumpkin lights featuring various colors and flickering effects are also marketed specifically for this purpose. It is common to see jack-o'-lanterns on doorsteps and otherwise used as decorations prior to and during Halloween.