LEDs. I prefer LEDs for all my signaling. These ones are 1.8mm, which are a tad smaller then opening in the signal head. I dip them in epoxy, which nicely fills out the hole, and gives a nice bulb and reflector look.
Nick
Take a Ride on the Reading with the: Reading Company Technical & Historical Society http://www.readingrailroad.org/
Nice work Nick, did you use bulbs or LED's? I just found that NJI uses 12-14v bulbs in their dwarf signals and not LEDs you don't need a resistor but I don't expect them to last nearly as long
I worked on some signals over the weekend....
These are simple point indicators for several crossovers between the Main and the Plaster Falls Branch
Green signal, crossover lined for the Branch. This signal displays yellow when lined for the Main:
Red signal, crossover line for the Main (approaching turnout from frog:
The signals started life as IHC two lamp D head targets. I cut them down and added bases to make dwarf signals.