Fill your bucket with soil, and pack it tightly. Drive a yard stake into the soil and secure it with the soil.
Attach the craft foam ball to the top of the stake; push it down onto but not through, the stake to form the head. Secure it to the stake with duct tape.
Draw the ghost a face using waterproof or permanent marker onto the white twin sheet. Drape the sheet over the ghost's foam ball head and secure with twine around the neck area, if wished. The sheet will drape around the bucket.
Set a spiral tomato cage upright on top of a bucket of soil.
String your string lights through the cage, with the cord hanging loosely toward the bottom, and secure as needed with twist ties.
Ball up one sock and duct-tape it to one end of a stick to form a hand and arm. Ball up a second sock and duct-tape it to one end of the second stick. Push both sticks into the soil under the cage at roughly a 45 degree angle to form arms, one on either side of the tomato cage. Add facial features to the white twin sheet with a marker, then drape it over the structure to create your lighted ghost.