Hi, I am your average person ignorant of electrical knowledge and need some advice on wiring up led's for a model I am making. Basically, I need to connect a dozen 3mm LEDs (the tiny bulbs with two wire legs coming off the body). The entire length will about 1.5mt long and the LEDs will be attached about every 5 to 6 inches along the length of wires with one at the very end. To put this into more context, I am building a 53" long model of a U Boat which has a cutaway body on one side. The led harness will light up the various compartments. Is it a simple case of exposing the wires (positive and negative) along various sections of the wires, soldering the legs to the correct wires, insulating and then connecting the end of the wire to a 12v converter so I can plug into the mains or do I need to be adding resistors or capacitors to make it safe? Any advice would be welcome.