This is 2 different styles of strobe lights, based off of a Tomar, and a Xenon style.
2 Tomars: One on a small square base, one with no base
2 Xenons: One on a small square base, one with no base
There is 4 of each style on the sprue.
While the Xenon only came in transparent orange, the Tomar style came in Red, Orange, Yellow, Blue, Clear, etc.
Used by MANY railroads, such as EJ&E, C&NW, ATSF, CSX, NJ Transit, SBD, Soo Line, and many others.
Commonly used on industrial engines, as well as those with Radio Control flashers.
Also used on various emergency vehicles.
1/87th scale. 10 per sprue. Uses a Number 53 drill bit for the mounting peg (may need to be slightly reamed with an exacto), which you can glue an SMD LED directly to the bottom of the light pipe. Can be painted with transparent red, yellow, orange, etc or left clear.