Thanks for the input Norm.
This is what I'm using to power the LEDs. It has a 3 volt side and an adjustable side. The LEDS weren't bight enough with just the fixed 3 volt setting. So I switched to the adjustable side and accidently put in too much voltage and fried the LEDS. It adjusts up to 20 volts. I did have a meter on it, but sinces its mounted on the bottom, I couldn't watch the LEDs and adjusted it too far.
I checked all of the outputs on the board and they are the same. All the + are connected together and all the - are connected together.
I have the LEDs on one frame paralleled together, then into the board to one output. Another frame into another output, etc.
1 x power distribution board self adapt distributor HO N O LED street light hub | eBay
Any suggestions on a regulated 3 volt power supply? Seems that would be the best of all worlds.
Also, what about the Woodland Scenics lighting system? Anyone using that for LED lighting?