What are the differences between a fluorescent light bulb and an incandescent light bulb?

Fluorescent light bulbs use gas and phosphor coating to produce light, while incandescent light bulbs use a filament that heats up to produce light. Fluorescent bulbs are more energy-efficient and last longer than incandescent bulbs, but they may have a flickering effect and contain small amounts of Mercury. Incandescent bulbs are cheaper upfront but have a shorter lifespan and are less energy-efficient.