Abstract: An imitated fireworks bulb set for Christmas tree decoration includes a plurality of imitated fireworks bulbs, a plug head having a transformer therein for electrical power supply, and an elongated electrical wire for electrically connecting the imitated fireworks bulbs to the plug head so as to connect the imitated fireworks bulbs together and provide electrical power to each of the imitated fireworks bulbs. Each of the imitated fireworks bulbs includes a bowl-like transparent shell, a casing connected to the transparent shell to form a container body, a hanger affixed to a top end of the casing, and an imitated fireworks generating device installed within the casing for rendering a plurality of optic fiber sticks disposed inside the transparent shell to provide fireworks like flashing effect at their light emitting tips.