i Know where really strong blue lights can be found and their effect is usually guaranteed to stop the heart!
The problem is they are quite difficult to locate.
The best way to find them is by driving at high speed and then carefully looking in your rear view mirror for Blue Lights to appear.

Rog
As some of you know I am a District Councillor a few Christmas back I was driving through part of my ward looking at outside Christmas Decorations quite slowly. Behind me was another car the slower i went to let it pass the slower it went. Suddenly The Blue Light came on. I thought oh my god, as I had been to an Xmas dinner but did drink in moderation but probably close to or over the limit Anyway Officious Policemen get out of the car who I had not seen before wanted to look at my driving licence inspect car etc
My licence says Cllr. Ian Gourlay
They phone up DVLA to check etc and then one policeman says to the other it does appear to be him.
I asked why did they stop me the reply was you were driving slow and that is unusual on this estate.
So you can get a blue light for driving through an estate carefully.
I never found the red light
