What are the differences between an incandescent bulb and a fluorescent bulb in terms of energy efficiency and lifespan?

An incandescent bulb is less energy efficient than a fluorescent bulb because it produces more heat than light, wasting energy. Fluorescent bulbs are more energy efficient as they produce less heat and more light. Additionally, fluorescent bulbs have a longer lifespan than incandescent bulbs, lasting up to 10 times longer.