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# How many amps in a string of Christmas lights?

Updated: 10/3/2023

Wiki User

10y ago

It depends on which lights get used. A 100-count string of incandescent mini lights runs at 40 watts, while a 70 count of 5mm Wide Angle LEDs is approximately 4.8 watts total. In fact, because incandescent wattage is 80-90% more than LED wattage, the cost to power an incandescent can be up to 90x greater than powering an LED.

Calculate Amps by dividing total wattage by 120 volts (US household outlets carry 120 volts)

Wiki User

10y ago

Wiki User

12y ago

100 miniature lights on a string of Christmas lights is 40.8 watts

Wiki User

11y ago

0.5 amps

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Q: How many amps in a string of Christmas lights?
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Related questions

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It depends on what type of Christmas lights. If they are the (now) standard 50 , 100, 150, mini-lights, they use a 3A fuse and you COULD use a MAXIMUM of about 750 lights if they are strung together from one string (end to end plugs) before blowing the fuse built into the plug of the first light set. If you plug them into separate outlets (or into an outlet-strip), then you could light about 3750 lights on a (otherwidse unused) 15 A household circuit. With the new LED type Christmas lights, it might be even more.

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15 amps at 80% = 12 amps continuous. Watts = Amps x Volts.

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