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I use white LED's that I purchase from Jameco Electronics for around $2.95 each. I am running DCC and use a 1k resistor to keep the voltage from burning out the led. If you are running analog (dc) you need a voltage regulator to get the voltage higher to light the LED at lower speeds. The LED's work great with DCC. The have virtually no draw, no heat and are really bright. The sometimes have a bluei***int to them, but I do not find it offensive. I am starting to use fiber optics as lenses with the LED's. The light is bright and projects well.
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