Scale is H0 1:87

Based on PKP PLK Light semaphores

available light count: 3,4,5

the 1st part is the cover, you put the leds and electronics in there and glue it shut with the second part. 

To put it on a mast you must first drill holes (or edit the model for holes, if you do please publish them here.)

diameter for led holes is 2.5mm