Ok I'm running fixed voltage of 16V to nine 022 switches on my layout and I have LED bulbs in the 022C controllers. These are nice because I have five different colors in switch board. I have a blue line, a green line, a white line, a yellow line, and a red line.
The problem was after burning out a dozen of the 12V LED I decided to take matters into my own hands. I modded my 022c controllers so they would correctly operate a screw in 12 volt LED and still provide 16V to the 022. All you need is a 1/8 watt 1k resistor before each bulb. You can get 50 of these mailed from China to your house for $1. You get 50 of these screw in LED for around $25 mailed from China to your house.
I'm attaching a picture hope you get the gist of it.
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