ANSWERS: 1
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Already done... you just gotta buy the more expensive light strings! There's two ways to wire Christmas lights -- series or parallel. In series wiring, the power flows THRU each lamp to get to the next one, so the failure of a single bulb brings down the whole string. In parallel wiring, the power flows to each bulb independently, and the dead bulb(s) are obvious. Spend those bucks! :)
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