What's With Blue Lights At Christmas?

[Wiirone]

Ok, this isn't Bah Humbug, honestly, but I don't think vivid blue lights are very Christmassy yet there seem to be so many of them everywhere.
I was flying in to Gatwick Airport a couple of weeks ago and there were blue lights to be seen in gardens as far as could be seen. Aaaaargh!!
Coloured lights, white lights, yes, but blue? Aaaaaarrrrgh!!!!!!

[Mani_H]

I have more of a pile it high attitude when it comes to Christmas lights, forget being classy this is the season of excess. Quite like the blue lights though.