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I bought a 24 LED tent light in order to try to replace my RV lights that use an incandescent bulb like an auto tail-light bulb. It contains 4 batteries in series, so I figured, I could simply use a series resistor to drop the remaining 6 volts and use the light. I measured the amperage and calculated the resistor value. The light was very dim. I reduced the resistance, but incurred a lot of heat from the increased current. My question is - since these are 6-volt lights, can I simply put 2 in series (and get twice the amount of light)? My electronics training is from many years ago, and I suspect I'm missing some special characteristics of the LED array that is being used. Any help would be appreciated. Jere