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I am going to start this again. I am not sure I want to use LED's on my new HO layout because I feel they don't give off true "prototypical" color as do incandescent bulbs, the "grain of wheat" type. The trick is how to get my three separate bulb colors (red, green, and amber) to all light individually, but more importantly, directly under the same fiber optic line? Back in 1976 I attended a train show in So. Calif and one of the vendor modelers there had a demonstration of his HO signals using fiber optics and 3 separate incandescent bulbs for color under one signal. As I recall, he had all three bulbs grouped close together in a small circle attached inside of what looked like a small dish, about the size of a contact lens. He could control the light by an electrical switch that rotated this dish from one color to the next, and so on. Green to red, then yellow, and back to green. He even had a "pulse" response that would make the caution "amber" light bright and then almost dim out in very prototypical fashion. I am not an electrical genious by any means and am wondering if any of you have suggestions and maybe know what I am describing. Also, is heat from grain of wheat going to be a problem? If LED's are the answer, and I am not saying no just yet, is there anyway to make LED's show truer "green" and "amber" color?
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