I'm trying to contruct a system that will send 12v to a grain of wheat bulb when a turnout is closed and send 12v to different bulb when the turnout is open. I was thinking mechanical but open to dcc suggesitons. Couple questions: 1) Will a grain of wheat bulb melt my plastic signal stalks? Should i buy led's? 2) is there some dcc based method of accomplishing this goal? (i have digitrax dcc) 3) can i use the 12v dcc track power to power my bulbs or should i just wire up a seperate circuit using a toy grade xformer? Thanks in advance .