I'm working with 5mm LEDs in my control panel driven by a 12 VDC 3A "switching" power supply that delivers consistent output (unlike a wall wart...
I made traffic light heads that are true to scale that can be fitted with SMD nano-LED's. I made them available via Shapeways.
When you let me...
Car Shop with lights on from front
Car Shop with lights on from corner
Car Shop Upside down showing the ceiling lights
LED indication of Kato turnout position.
Testing white SMD LEDs with 1K, 1.5K and 2.2K Ohm SMD Resistors.
4 LED's light the Riverside Drive Underpass. Built from Walthers Cornerstone Art Deco Highway Underpass.
LED lighting for Riverside Drive Underpass. A power distribution block is centered on the bottom of the underpass.
Four LED's light the Riverside Drive underpass walkways.
Under layout installation of Cryon LED Media Highlighter