waxed leaves... Make sure your leaves are completely dry. Melt some beeswax in a double-boiler. You can use new wax or old candle stubs (optional - add a few drops of cinnamon oil). When the wax is thoroughly melted, take the leaves by the stem and immerse them, one at a time, in the wax. Hold them over the pot to drip a bit, then lay them on waxed paper to dry.
Garden path pumpkin lights! Awesome illumination!