We just found out by accident today that Japan railway operators actually install blue LED lights above train platforms to calm suicidal commuters down. When they started doing it in 2009 as an experiment at three suicide hotspots along the Joban Line through Mito city, there was nothing to show if it would work.
Now the results are in: the number of fatal accidents in these areas actually fell over the years. Preliminary results are showing that suicides almost halved in those areas, and according to an observational study by a team from the University of North Texas, te blue lights resulted in a 84% decrease in the number of suicides. Beam these blue lights to save lights, we say, beam on.