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A 13W bulb consumes 13W/110V=0.118 A.

If you use it for an hour, it consumes 0.118 Ah, for 2 hours 0.236 Ah, and so on..

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Lamps don't use ampere hours, as this is simply a unit of measurement for electric charge. You probably mean 'watt hours' which is a measure of energy. A 13-W lamp will use 13 Wh for each hour it is used.

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9y ago
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5mo ago

To calculate the amp hours used by a 13 watt bulb, divide the wattage by the voltage of the power source. For example, if the bulb is connected to a 120V power source, the current drawn would be 13W/120V = 0.1083 amps. This means the bulb would use 0.1083 amp hours for every hour it is on.

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11y ago

It depends.

To get the Amps a 3 Watt bulb uses, divide the Watts by the Voltage.

Current (in Amps) = Watts/Voltage.

A 3 watt bulb operating on 3 volts would use 3/3 or 1 amp.

A 3 watt bulb operating on 9 volts would use 3/9 or one third of a amp.

A 3 watt bulb operating on 120 volts would use 3/120 or 0.025 amps or twenty five thousandths of an amp.

A 3 watt bulb operating on 240 volts would use 3/240 or 0.025 amps or one hundred and twenty-five ten-thousandths of an amp.

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Q: How many amp hours does a 13 watt bulb use?
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