tsr
Established Member
Possibly, although the main use of blue lighting on the railway is to deter suicides (e.g. Gatwick Airport platforms).
I'm told that this is the reason in this specific case.
However, I haven't seen any formal evidence to confirm it.
I should imagine that having this intense blue light also makes the area less attractive for people to loiter, as it's pretty harsh and unforgiving. It would also be a little bit harder to carry out complex graffiti attacks, as colours would probably be harder to paint.