Put on your protection gloves. Ideally the bulbs should remain intact in your hands if you are enough but to be on the safe side, it is always best to wear gloves before starting. Use the tweezers to remove the upper cap on the black part of the light bulb. When the cap is pulled off, it will leave behind a hole in the black part. Twist and pry your screwdriver into this hole to snap the black glass. Once done clear the debris. You now will have a glass bulb with a clear narrow opening.
Inside the glass bulb, there will be a system of thin wires and glass tubes. Once again use your tweezers to take them off so that you are left with an empty glass bulb which can serve as your vase. However, do all this really carefully because a hit from the tools can easily break the bulb into pieces and your project will be destroyed. The job requires patience and precision. It is better to do it over a cloth or plastic underneath so that you can easily throw off the materials you clear from inside the bulb.
Now that the bulb is cleared, rinse it with water lightly to clear off the debris entirely. Your vase is ready. You can keep both artificial and natural flowers in it. The natural flowers will of course need water. You can hang it by wrapping a twine around its mouth. You can also place it on a standing position somewhere like on a desk by placing it on a flat lid of an empty container. All up to the power of your imagination.