Steam Loco Greg posted:Stan, all,
...The one trick you have to remember is that since they are LEDs, position is important. They will light in one direction and not the other...
So to be clear, you are using a DC output power source for your building lighting?
For guys using the Accessory 14-16V AC output from some train transformers, the LEDs should light when plugged in either way. Note that if willing/able to go DC, the cost of DC lighting power is substantially less than using AC. A $1 female screw-terminal adapter can be used so as not to splice/strip the cable/connector from the laptop charger.
When you use 14-16V Accessory AC power from a train transformer, you are "stealing" from the available Track motive AC power. So, for example, if your lighting uses 50 Watts from Accessory AC, that's 50 Watts less power available to run trains themselves. Note that a Watt of AC power from a train transformer can run you up to $1 per Watt, while a Watt of DC power from a laptop charger or PC supply might be closer to 10 cents per Watt.
