I don't often get to see 1:1 locos pass by me, much less after dark, but I'm pretty sure I've seen engines that lighted their steps (is there a more railroady term for them?). My USAT S4 has a hole at the top of the steps at each corner of the engine and I'm thinking it'd look good to light 'em up.
There's lots of room behind these holes to put a cheap white LED. I might be able to find some sort of "lens", but not a big deal if I don't. Could even simplify the wiring by having them on all the time; I doubt they'd be noticeable in daylight.
Is that what these holes are for?
JackM

There's lots of room behind these holes to put a cheap white LED. I might be able to find some sort of "lens", but not a big deal if I don't. Could even simplify the wiring by having them on all the time; I doubt they'd be noticeable in daylight.
Is that what these holes are for?
JackM