wattage is important because a watt is a unit of power. Watts also matter when you're choosing a light bulb to use in a fixture that has a maximum wattage limit or when you're replacing one of the bulbs in a multi-bulb string, such as your Christmas tree lights.
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Answer:
wattage is important because a watt is a unit of power. Watts also matter when you're choosing a light bulb to use in a fixture that has a maximum wattage limit or when you're replacing one of the bulbs in a multi-bulb string, such as your Christmas tree lights.