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I would use no more 14 100watt bulbs on a 15 amp circuit or 19 bulbs on a 20 amp circuit. You can calculate this by taking 80% of circuit amperage I.E 12 amps or 16 amps and then multiply by circuit voltage(120) to get 1440 watts and 1920 watts. Then take these values divided by bulb wattage(100 watts) to get 14.4 bulbs and 19.2 bulbs. Then round down for partial bulbs to get 14 bulbs and 19 bulbs.

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14y ago
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12y ago

Depends on wattage of each bulb. Multiply the wattage of a bulb by 100. Guess is between 1 and 3 watts per bulb.

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Q: How many 100 watt lights per breaker?
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