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Aug 2008
1m 14s

How 3-Way Lightbulbs Work

iHeartPodcasts
About this episode
A 3-way bulb contains two filaments, and these filaments have differing wattages. Depending on the setting, the filaments operate separately or together to create the appropriate amount of light. Learn more about 3-way bulbs in this HowStuffWorks podcast. 
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