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As people start putting up their Christmas decorations, many are discovering a red lightbulb on their string of lights and are unsure of its purpose.
A woman on TikTok shared a video explaining that the red light is not a spare bulb or replacement, but actually has a specific use. By replacing one regular bulb with the red one, it creates a flickering effect on the string of lights. Check out the video below!
Many viewers were surprised by this revelation, with some admitting they had thought the red light was a spare bulb. Others claimed to have known about this use for years.
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