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Ron if you connect the bulbs in series you can drop the voltage without a resistor. If you have twelve structures, just connect twelve bulbs in series and light each structure. The problem with this is that when one bulb goes out, the whole string will go out and you will have to hunt the bulb out. Why twelve? ... divide eighteen volts by twelve and you get one-and-a-half, the rating of the bulb. As a matter of fact, using eighteen bulbs will make them dimmer and they will last longer. <br /> <br />Good Luck - Ed
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