To use milk jugs as Halloween runway lights, start by cleaning empty plastic milk jugs and removing the labels. Cut out simple faces or shapes on the sides if desired, or leave plain for a subtle glow. Place battery-operated tealight candles or string lights inside the jugs to create soft illuminated pumpkins. Line these lighted jugs along your driveway or walkway, spacing them evenly to guide trick-or-treaters safely to your door like runway lights. This inexpensive and lightweight setup is weather-resistant, easy to assemble and store, and adds both function and festive atmosphere. Kids love the glowing path, and the jugs are reusable year after year, making it a budget-friendly Halloween lighting solution.